1. Normandy UniversityUniversity of RouenINSERM U1234Rouen University Hospital Rouen France
2. Édouard Herriot University Hospital Lyon France
3. St. Eloi Hospital and Montpellier University HospitalINSERM U1051 Montpellier France
4. St. Eloi Hospital and Montpellier University Hospital Montpellier France
5. Lyon University and Édouard Herriot University Hospital Lyon France
6. Strasbourg University Hospital and Centre de Référence des Maladies Autoimmunes Rares Strasbourg France
7. Necker University HospitalAP‐HP Paris France
8. European Reference Network on Connective Tissue and Musculoskeletal DiseasesUniversity of LilleHospital Claude Huriez Lille France
9. Hôtel‐Dieu and CHU de Nantes Nantes France
10. AP‐HPHenri Mondor Hospital Créteil France
11. AP‐HPPitié‐Salpêtrière University Hospital Paris France
12. Normandy UniversityUniversity of RouenINSERM U1245 Rouen France
13. AP‐HPPitié‐Salpêtrière University HospitalCentre de Référence Maladies Neuro‐Musculaires, DHU i2B, INSERM UMRS 974 Paris France
14. Normandy UniversityUniversity of RouenINSERM U1234Rouen University Hospital, Rouen, France, and French West Indies University and Pointe‐à‐Pitre University Hospital Pointe‐à‐Pitre Guadeloupe France