Franco-German cohort study on factors associated with weight loss in amyotrophic lateral sclerosis (ALS)

Background

Amyotrophic lateral sclerosis (ALS) is the most common motor neuron disease in adults. It is highly variable in terms of clinical presentation, genetics, and neuropathology. ALS is a fatal disease that progresses inexorably within a few years of onset.

Weight loss in ALS

Extensive data have demonstrated the importance of weight loss at diagnosis and during disease progression. Recent studies have shown that weight loss is a central mechanism, occurring very early—even before motor symptoms appear.

Between one-third and two-thirds of patients experience weight loss, which is negatively associated with survival. High-calorie diets have been shown to slow weight loss and extend survival in patients with rapidly progressing ALS.

However, the pathophysiological mechanisms underlying weight loss remain unknown. Identifying these mechanisms could lead to effective therapeutic strategies to combat weight loss, thereby improving survival and quality of life in ALS patients.

FG-CoALS is an innovative, multidisciplinary project aiming to establish a large Franco-German cohort to identify markers associated with weight loss in ALS.

Study objectives

The primary objective of this study is to identify biological, genetic, and imaging markers associated with weight loss in ALS patients, and to analyze their correlations with clinical presentation.

French data from the project will be transferred to the secure France Cohortes information system, ensuring information sharing with researchers at both national and international levels, in accordance with FAIR principles.

Study design

This is an academic, prospective, multicenter study including 7 ALS reference centers in France and 2 in Germany.

  • At least 1,000 patients will be included.
  • A sub-cohort of 400 patients will undergo additional investigations.
  • Patients will be stratified into four groups according to their percentage of weight loss:
    1. No weight loss
    2. <5% weight loss
    3. 5–10% weight loss
    4. 10% weight loss

Each patient may be included in both the main cohort and the sub-cohort.

Eligibility

  • Inclusion: Any new patient diagnosed with ALS, aged over 18, managed and followed at one of the 9 participating ALS centers in France and Germany.
  • Exclusion: Patients with significant cognitive impairment or those who refuse riluzole treatment.
  • All participants must be covered by a national health insurance scheme.

FG-CoALS Consortium

ALS and motor neuron disease reference centers (France):

  • Prof. Philippe COURATIER – CHU Limoges
  • Prof. Gaelle BRUNETEAU – Pitié-Salpêtrière Hospital Group
  • Dr. Pierre-François PRADAT – Pitié-Salpêtrière Hospital Group
  • Prof. Philippe CORCIA – CHRU Tours
  • Dr. Véronique DANEL BRUNAUD – CHU Lille
  • Dr. Marie-Hélène SORIANI – CHU Nice
  • Dr. Elisa DE LA CRUZ – CHU Montpellier
  • Prof. Sharam ATTARIAN – CHU Marseille

ALS expert centers (Germany):

  • Prof. Albert LUDOLPH – University of Ulm
  • Prof. Susanne PETRI – Hannover Medical School

INSERM research teams:

  • Dr. Luc DUPUIS – U1329
  • Dr. Séverine BOILLÉE – U1127
  • Prof. Hélène BLASCO – U1253
  • Prof. Patrick VOURC’H – U1253

Governance

Sponsor: 

CHU de Limoges 

Coordinator:

  • Prof. Philippe COURATIER – Medical and Scientific Principal Investigator (ALS & Motor Neuron Diseases Reference Center, CHU Limoges)
  • Dr. Luc DUPUIS – Scientific Coordinator for biological analyses
  • Dr. Daniells ERAZO – Scientific and Methodological Lead

Steering Committee: 

Philippe COURATIER, Luc DUPUIS, Daniells ERAZO, Albert LUDOLPH, Sandra JUGE

Scientific Committee: 

Philippe COURATIER, Luc DUPUIS, Pierre-Marie PREUX, Daniells ERAZO, François SALACHAS, Séverine BOILLÉE, Pierre-François PRADAT, Patrick VOURC’H, Albert LUDOLPH, Hélène BLASCO

Contact

Sponsor : BMA- CHU DE LIMOGES  2 avenue Martin Luther King 87042 Limoges Cedex

Contact: FG-CoALS@chu-limoges.fr

This data management initiative, provided by France Cohortes, is supported by the French government through the National Research Agency (ANR) under the France 2030 program, reference ANR-21-PMRB-0012.

Incident ALS cases will be included in the participating centers in France and Germany. Patients will be stratified according to weight loss at the time of diagnosis. A prospective follow-up will be conducted every 3 months to assess disease progression and survival, with a total follow-up period of 18 months.

A minimal dataset will be collected within the cohort, including sociodemographic characteristics, neurological, respiratory, and cognitive-behavioral assessments, as well as genetic analyses (GWAS and ALS gene panel).

A sub-cohort will be established to identify additional factors, including metabolic and metabolomic markers, neurofilaments, inflammation, and imaging.

FG-CoALS
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A deep-phenotyping database using artificial intelligence to study craniofacial anomalies during development

Project objectives

FACE.S-4-KIDS is a database project focused on the scientific question of genetic heterogeneity and the variable expression of craniofacial malformations. Its goal is to enable optimal clinical management (diagnosis, prognosis) and to support personalized treatment plans, particularly surgical interventions.

Governance

Scientific and Technical Lead: Prof. Stanislas LYONNET, Imagine Institute of Genetic Diseases, Paris (IHU Imagine).

This data management initiative, provided by France Cohortes, is supported by the French government through the National Research Agency (ANR) under the France 2030 program, reference ANR-21-PMRB-0012.

FACE.S-4-KIDS
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European cystinosis cohort: new biomarkers and new therapeutic approaches

Cystinosis is a rare multisystemic disease caused by cystine accumulation, with an incidence of 1:180,000 births.
Specific treatment with cysteamine slows down renal and extra-renal complications and improves life expectancy. However, knowledge gaps remain concerning the long-term impact of therapy and follow-up.

Cohort objectives

Recently, new treatments have become available in Europe, including extended-release cysteamine and a new ophthalmic solution. Moreover, stem cell transplantation has emerged as a promising therapeutic option.

The ECYSCO cohort is a multicenter, longitudinal, non-interventional European study designed to collect homogeneous clinical and therapeutic data. It involves 27 centers in France and 4 in other European countries.

The migration and integration of the ECYSCO database into the France Cohortes information system will also make it possible to ensure interoperability with a European registry, enabling broader data sharing for research.

This well-characterized cohort is a major tool for:

  • Setting up clinical trials with innovative therapeutic strategies currently under development for cystinosis
  • Identifying eligible patients
  • Serving as a control group
  • Evaluating the efficacy and safety of treatments on disease complications

Governance

Scientific and Technical Leads:

  • Dr. Aude SERVAIS – Hôpital Necker, AP-HP, Paris
  • Prof. Patrick NIAUDET – Hôpital Necker, AP-HP, Paris
    European Reference Network (ERN) ERKNet

This data management initiative, provided by France Cohortes, is supported by the French government through the National Research Agency (ANR) under the France 2030 program, reference ANR-21-PMRB-0012.

RaDiCo - ECYSCO
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Using Artificial Intelligence to create minimum data sets for rare diseases

Objectifs du project

The aim of CDE.ai is to create, within the France Cohortes platform, a set of automatic language processing (ALP) algorithms that will enable clinical research forms to be completed semi-automatically, in particular the rare diseases minimal data set, which is currently completed manually for all patients followed up in rare disease expert centres.

Gouvernance

Scientific and technical coordinators: Pr Guillaume ASSIÉ, Assistance Publique-Hôpitaux de Paris (APHP) Endocrinologie Cochin, University of Paris, Institut Cochin, Institut national de la santé et de la recherche médicale (INSERM), Centre national de la recherche scientifique (CNRS), and Dr Anne-Sophie JANNOT, APHP, Banque nationale des maladies rares (BNDMR), Paris.

This data management work, provided by France Cohortes, benefits from State aid managed by the Agence Nationale de la Recherche under the France 2030 programme, reference ANR-21-PMRB-0012.

CDE.ai
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A CNV database to reduce diagnostic wandering, identify new genes, and expand our knowledge of the human genome

BANCCO+ succeeds the BANCCO project (French National Bank of Constitutional CNVs), which aimed to create a national database of Copy Number Variations (CNVs) identified in patients through Chromosomal Microarray Analysis (CMA).
CNVs refer to gains or losses of chromosomal segments of varying sizes (from a few hundred to several million bases), which can be associated with disease.

Project objectives

The project focuses on diagnosing chromosomal imbalances in patients, particularly those with neurodevelopmental disorders (NDDs).

Today, the collection, annotation, and interpretation of CNVs remain challenging. BANCCO+, in connection with other international initiatives, will provide major support, especially for biologists and clinicians.

Ultimately hosted within the France Cohortes information system, BANCCO+ aims to become the most comprehensive French database on CNVs.

Project governance

BANCCO+ Consortium

  • Scientific Coordinator: Prof. Damien SANLAVILLE, Hospices Civils de Lyon (HCL), Lyon
  • System Development Lead: Prof. Christophe BÉROUD, Aix-Marseille Université (AMU), Marseille
  • Data Collection Lead: Dr. Frédéric BILAN, CHU de Poitiers, Poitiers

A database involving multiple stakeholders

National partners

  Achro-Puce network  

 

  DEFIDIAG, the pilot project for Rare Diseases under the France Médecine Génomique 2025 Plan 

 

   National Association of Molecular Genetics Practitioners 

 

  NGS Diagnostic network 

 

   French Society of Fetal Pathology 

 

   Association of French-speaking Cytogeneticists   

 

 Association of Carriers of Chromosomal Anomalies

Scientific and Ethics Committee

  • Prof. Sylvie JAILLARD, ACLF
  • Prof. Valérie MALAN, Achro-Puce network
  • Dr. Jean MULLER, NGS-Diag network
  • Dr. Amélie PITON, RéDDI network
  • Prof. Jean-François GUERIN, University of Lyon, former President of the HCL Ethics Committee
  • Mrs. Isabelle MARCHETTI-WATERNAUX, President, Association VALENTIN APAC
  • Dr. Sihem KHEDDOUCI, R&D Project Manager, Lyon Ingénierie Projets

Ce projet bénéficie d'une aide de l’État gérée par l'Agence Nationale de la Recherche au titre de France 2030 portant la référence ANR-21-PMRB-0012.

BANCCO+
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National cohort dedicated to research on the biological and environmental determinants of autism and neurodevelopmental disorders

The research work carried out within the framework of MARIANNE should make it possible to identify new diagnostic and therapeutic biomarkers, develop earlier personalized care, better understand the mechanisms of autism spectrum disorder (ASD) and its various forms, and orient national policies for the care of this disorder.

Key elements

  • Inclusion and follow-up of 1200 families with a sibling with autism from the prenatal period (parent-baby) compared to 500 families from the general population
  • Launched in July 2022 for a duration of 10 years
  • Inclusion starting in March 2023

Objectives of the cohorte

  • To compare environmental exposure and development from birth to 6 years of age of children with autism spectrum disorder (ASD)/neurodevelopmental disorder (NDD) and those with normal development in a cohort study for which the data will be used to guide a large research infrastructure.
  • To identify and clinically characterize cases of ASD and NDD.
  • To describe the clinical course from birth to age 6 of ASD and NDD cases for different dimensions.
  • To describe access to care and the care pathway of ASD and NDD cases and the modalities of management.
  • To identify prenatal and perinatal risk factors for ASD and NDD related to the external exposome, such as parental health and lifestyle, socioeconomic characteristics, maternal diet during pregnancy, maternal medication use during pregnancy, pregnancy and delivery complications, and environmental chemical exposure
  • To study the interactions between exposome risk factors and the genome in ASD and NDD
  • To assess the medico-economic impact of ASD and NDD
  • To study the impact of parental mental health, access to care and specialized interventions, socio-economic status, and education on child health and outcomes.

Management and governance

The project leaders are Prof. Amaria BAGHDADLI, professor of child psychiatry, head of the Center of Excellence on Autism and Neurodevelopmental Disorders in Montpellier (University and University Hospital) and also a researcher in epidemiology at the french National Institute of Health and Medical Research (Inserm) at the french Center for Research in Epidemiology and Population Health (CESP), and Dr Marie-Christine PICOT, epidemiologist (Montpellier University Hospital and Inserm CESP).

They both have recognized expertise in the setting up of cohorts and the clinical epidemiology of child development disorders. The governance bodies of the cohort include a Steering Committee, a Strategic Council, and a Scientific and Ethical Committee.

Partnership with industry, notably through its contribution to the scientific orientation, will be envisaged in a second phase of the project, after completion of the pilot study, with the support of Inserm transfert.

Informations détaillées

MARIANNE
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Epidemiological study with E3N women and their families

The E3N-Generation study is interested in the influence of the “exposome” - the environment in the broad sense and contemporary lifestyle on health, among people of the same family, over three generations.

Key elements

  • Generalist cohort - over three generations
  • 140,000 participants
  • Since 1990

Objectives of the cohort

The E3N-Generations study relies on a community of families, a family cohort that will eventually have 200,000 participants.

It extends the E3N study which has been actively following since 1990 (30 years!) 100,000 women, by inviting their children, the fathers of those children and their grandchildren to participate in turn.

E3N-E4N is one of only two epidemiological studies in the world of this magnitude bringing together families across three generations.

The members of the same family have genes, habits and living places in common. This vast community of families is a powerful research tool for unraveling what is genetic, lifestyle or environmental in our health.

The study will provide a better understanding of what exposes us to chronic diseases or protects us from them, by comparing the evolution of the health of different groups within the cohort. Researchers are interested in cancers, cardiovascular diseases, inflammatory bowel diseases, diabetes, asthma, Parkinson's disease, depression, anxiety, endometriosis, but also aging well.

The study is involved with other cohorts in research consortia to analyze such topics on a larger scale. That is the case of the European EPIC consortium on cancer (more than 500,000 subjects) and the French SAPRIS study on Covid19 (139,000 participants from 5 cohorts).

This research will make it possible to drive future public health policies and refine prevention messages.

Management and governance

The E3N-Generation study is led by Gianluca Severi, research director at the National Institute of Health and Medical Research (Inserm U1018-CESP). Its governance is ensured by the founding partners: Inserm, the University of Paris-Saclay, the Gustave Roussy Institute, the National League Against Cancer and the National Education General Mutual Benefit Society (MGEN).

Detailed information

  • MacDonald CJ, El Fatouhi D, Anne-Laure Madika AL, Fagherazzi G, Kurth T, Severi G, Boutron-Ruault MC. Association of Migraine With Incident Hypertension After Menopause. A Longitudinal Cohort Study. Neurology Jul 2021, 97 (1) e34-e41
  • Dietary exposure to brominated flame retardants and risk of type 2 diabetes in the French E3N cohort. Ongono JS, Dow C, Gambaretti J, Severi G, Boutron-Ruault MC, Bonnet F, Fagherazzi G, Mancini FR. Environ Int. 2019 Feb;123:54-60. doi:10.1016/j.envint.2018.11.040.
  • Stringhini S, Carmeli C, Jokela M, Avendaño M, Muennig P, Guida F, Ricceri F, d'Errico A, Barros H, Bochud M, Chadeau-Hyam M, Clavel-Chapelon F, et al; LIFEPATH consortium. Socioeconomic status and the 25 × 25 risk factors as determinants of premature mortality: a multicohort study and meta-analysis of 1·7 million men and women. Lancet. 2017 Mar 25;389(10075):1229-1237.
  • Beelen R, Raaschou-Nielsen O, Stafoggia M, Andersen ZJ, Weinmayr G, Hoffmann B, Wolf K, Samoli E, Fischer P, Nieuwenhuijsen M, Vineis P, Xun WW, Katsouyanni K, Dimakopoulou K, Oudin A, Forsberg B, Modig L, Havulinna AS, Lanki T, Turunen A, Oftedal B, Nystad W, Nafstad P, De Faire U, Pedersen NL, Ostenson CG, Fratiglioni L, Penell J, Korek M, Pershagen G, Eriksen KT, Overvad K, Ellermann T, Eeftens M, Peeters PH, Meliefste K, Wang M, Bueno-de-Mesquita B, Sugiri D, Krämer U, Heinrich J, de Hoogh K, Key T, Peters A, Hampel R, Concin H, Nagel G, Ineichen A, Schaffner E, Probst-Hensch N, Künzli N, Schindler C, Schikowski T, Adam M, Phuleria H, Vilier A, Clavel-Chapelon F et al. Effects of long-term exposure to air pollution on natural- cause mortality: an analysis of 22 European cohorts within the multicentre ESCAPE project. Lancet. 2014 Mar 1;383(9919):785-95.
  • Stringhini S, Carmeli C, Jokela M, Avendaño M, McCrory C, d'Errico A, Bochud M, Barros H, Costa G, Chadeau- Hyam M, Delpierre C, Gandini M, Fraga S, Goldberg M, Giles GG, Lassale C, Kenny RA, Kelly-Irving M, Paccaud F, Layte R, Muennig P, Marmot MG, Ribeiro AI, Severi G, et al. LIFEPATH Consortium. Socioeconomic status, non-communicable disease risk factors, and walking speed in older adults: multi-cohort population based study. BMJ. 2018 Mar 23;360:k1046.
  • Plus de publications ici.

Terms and conditions of accessing cohort data

  • Requests for access to data and biological samples from the E3N-E4N cohort for research projects should be sent to: contact@e3n.fr.
  • Assessed by the cohort's access committee according to the endpoints of scientific quality, relevance, quality of the team or teams leading the project, and the relationship with other ongoing projects.
  • Access to data is subject to obtaining the necessary funding and authorizations from the authorities concerned.
E3N-Générations
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Cohort of health examination center consultants

Constances monitors 220,000 volunteers using an annual questionnaire, a health examination every 4 years and by annual matching with the old-age insurance and the national health data system (SNDS) databases. Creation of a biobank of 80,000 volunteers. A cohort of 400,000 persons is strictly representative of the eligible population followed in the administrative databases and makes it possible to study the effects of selection.

Key elements

  • Launched in 2012
  • “Generalist” population cohort
  • Representative sample of 220,000 adults affiliated with the general social security scheme, aged 18 to 69 at enrollment
  • Open to the research and public health community

Objectives of the cohorte

Constances is a tool for epidemiological research, due to its size, the particularly comprehensive nature of the system for monitoring and collecting highly diversified information, using several data sources, it is on the scale of the largest cohorts in the world.

Constances is a tool for public health and monitoring, designed to support the public health objectives of the National Health Insurance Fund (CNAM) and the State, in particular through a partnership with Santé Publique France (French Public Health Agency).

Management and governance

Constances is managed within the framework of the Joint Service Unit (UMS) 11, resulting from a partnership between Inserm, Paris Cité University (UPC), Paris-Saclay University (UPS), and Versailles Saint-Quentin-en-Yvelines University (UVSQ).

The Constances project is carried out thanks to the participation of Health Examination Centers, and with additional support from the National Health Insurance Fund (CNAM), the National Old Age Insurance Fund (Cnav), and the french Ministry of Health (General Directorate of Health). 

It is coordinated by Marie Zins, epidemiologist, research professor at UPC.

List of accessible publications here.

Terms and conditions of accessing cohort data

  • On a scientific project after evaluation by an international Scientific Advisory Board.
  • Open to industry within the framework of partnerships managed by Inserm Transfert.
  • The data matched to the SNDS is accessible via the Secure Data Access Center (CASD) platform.
CONSTANCES
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French cohort of patients suffering from bipolar disorder or schizophrenia

PSY-COH is a research project dedicated to the creation of a national cohort on bipolar disorders and schizophrenia. Its aim is to follow people with bipolar disorder or schizophrenia for several years, in order to characterise the stages of the disease and the associated biological markers.

Key elements

  • Launched in 2014
  • 1,452 patients with psychotic disorders (bipolar disorders and schizophrenia)

Objectives of the cohorte

The main aims of the PSY-COH project are:

  • Identify the clinical forms (age of onset, cognitive decline, somatic comorbidities, etc.) of the diseases and validate the different stages in the evolution of the pathology (staging).
  • Characterisation of patient trajectories and their evolution through the different stages of the disease, and through behavioural indicators, predictive and prognostic biomarkers.
  • Estimating the use of healthcare services, the cost to society and the quality of life of patients suffering from these diseases.
  • Improving early diagnosis and prevention of the mental disorders studied by identifying valid biomarkers and biosignatures (construction of bio-banks enabling ancillary research projects to be set up).
  • Enable national or international academic collaborators, or industrial partners, to access the cohort or the data collected, and accelerate scientific progress in the study of these pathologies.

PSY-CO is divided into several programmes:

  • PSY-COHorte-BP for monitoring patients with bipolar disorder
  • PSY-COHorte-SZ for monitoring patients suffering from schizophrenia

Management and governance

PSY-COH is a programme run by the FondaMental Foundation, a scientific cooperation foundation which relies on the national network of FondaMental Expert Centres and a network of research laboratories (Inserm (Institut National de la Santé et de la Recherche Médicale), CEA (Commissariat à l'Energie Atomique et aux Energies), CNRS (Centre National de la Recherche Scientifique), Institut Pasteur, etc.). ), under the direction of Professor Marion Leboyer, Université Paris Est Créteil, AP-HP (Assistance Publique Hôpitaux de Paris), Inserm and the FondaMental Foundation.

Detailed information

Publications on :

  • Bipolar disorder : here
  • Schizophrenia : here

How to access data

  • On request to the Fondation FondaMental
  • Completion of an application by the project leader wishing to use the database/biological samples.
  • Assessment of the application by the PsyCoh cohort steering committee, which, if it accepts it, informs the project sponsor and draws up a data/biological sample transfer contract.

 

 

 

PSY-COH
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Rare Disease Cohort Program

Program

RaDiCo hosts 13 rare disease cohorts selected by an international jury.

These cohorts cover 67 diseases with the following objectives:

  1. Describe the natural history of rare diseases
  2. Identify the genes involved
  3. Establish phenotype–genotype correlations
  4. Elucidate pathophysiological mechanisms
  5. Identify new therapeutic approaches
  6. Assess societal and medico-economic impact
  7. Identify patients eligible for innovative therapies

RaDiCo also provides a national operational platform. Comparable to a research infrastructure, it supports the development of rare disease e-cohorts meeting strict excellence criteria. Processes are standardized, monitored by quality indicators, and designed for scalability.

The platform enables pooling of expertise and tools necessary to build a shared database. This interoperable, cloud-based, GDPR-compliant database ensures continuous monitoring of data quality and consistency. It is also compatible with the French National Health Data System (SNDS) and the Health Data Hub (HDH).

Cohorts in the program

  • RaDiCo-AC-ŒIL (Profs. P. Calvas & N. Chassaing)
    National cohort on congenital eye anomalies: natural history, genetic determinants, and improvement of ocular and extra-ocular prognosis for better patient care.
  • RaDiCo-COLPAC (Dr. C. Corpechot)
    National cohort on the epidemiology and clinical/genetic heterogeneity of the Low Phospholipid-Associated Cholelithiasis (LPAC) syndrome.
  • RaDiCo-ECYSCO (Dr. A. Servais & Prof. P. Niaudet)
    National and European cohort on cystinosis.
  • RaDiCo-DCP (Profs. B. Maitre & E. Escudier)
    Primary ciliary dyskinesias: identification of specific severity criteria and investigation of genotype–phenotype correlations.
  • RaDiCo-EURBIO-Alport (Dr. L. Heidet & Prof. B. Knebelmann)
    Alport syndrome: European cohort and database for the identification of prognostic biomarkers.
  • RaDiCo-GenIDA (Prof. J.-L. Mandel)
    International social network for collecting information on the natural history of rare monogenic forms of intellectual disability and/or autism.
  • RaDiCo-IDMet (Profs. A. Linglart & I. Netchine)
    National and European cohort on imprinting disorders and their metabolic consequences.
  • RaDiCo-MPS (Dr. B. Héron)
    National cohort on mucopolysaccharidoses in the era of specific treatments.
  • RaDiCo-PID (Profs. A. Clement & V. Cottin)
    National cohort on interstitial lung diseases in children and adults.
  • RaDiCo-SEDVasc (Prof. X. Jeunemaître)
    National cohort on vascular Ehlers-Danlos syndrome.

Governance

The RaDiCo research program is coordinated by Inserm (French National Institute of Health and Medical Research).

It is led by Dr. Sonia Gueguen, Unit UMR-S 933 "Genetic Diseases with Pediatric Expression", Armand Trousseau Hospital, Assistance Publique–Hôpitaux de Paris (AP-HP), Sorbonne Université.

Further information

RaDiCo
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