1. Division of Endocrinology and Metabolism, and the Institute for Human Genetics, Department of MedicineUniversity of California San Francisco CA USA
2. Unit of Rare Diseases, Department of PediatricsIRCCS Giannina Gaslini Institute Genoa Italy
3. Radiant Hope Foundation and the Ian Cali FOP Research Fund, PENN MedicineCenter for Research in FOP & Related Disorders
4. Departments of Orthopaedic Surgery and Genetics, The Center for Research in FOP & Related DisordersUniversity of Pennsylvania School of Medicine; and MedStar Georgetown Transplant Institute Georgetown University School of Medicine Washington DC USA
5. Division of Endocrinology, Diabetes and Metabolism, Departments of Medicine and Orthopaedic SurgeryUniversity of Pennsylvania School of Medicine Philadelphia PA USA
6. Department of MedicineMayo Clinic Rochester MN USA
7. Department of AnesthesiologyThomas Jefferson University Philadelphia PA USA
8. Department of Internal Medicine section Endocrinology, Amsterdam Bone CenterAmsterdam University Medical Centers location VUmc Amsterdam the Netherlands
9. Royal National Orthopaedic Hospital Stanmore UK
10. Centre de Référence Maladies Osseuses Constitutionnelles, Departement de GénétiqueHôpital Necker‐Enfants Malades, Institut Imagine Paris France
11. Institute of Health and Biomedical Innovation, Queensland University of Technology, Translational Research Institute Woolloongabba QLD Australia
12. Division of Pediatric OrthopaedicsSeoul National University Children's Hospital Seoul South Korea
13. Pediatric Rheumatology Section, Department of PediatricsHospital Italiano de Buenos Aires Ciudad Autónoma de Buenos Aires Argentina
14. Hospital Israelita Albert Einstein, Instituto de Ensino e Pesquisa São Paulo‐SP Brazil
15. Department of Rehabilitation Medicine, Graduate School of MedicineUniversity of Tokyo Tokyo Japan
16. Department of Pediatrics, Klinikum Garmisch‐Partenkirchen GmbH Garmisch‐Partenkirchen Germany
17. Paediatric Rheumatology, Red Cross Children's HospitalUniversity of Cape Town Cape Town South Africa
18. Department of Endocrinology, Tongji HospitalShanghai Tongji University Shanghai China
19. Sidney Kimmel Medical CollegeThomas Jefferson University Philadelphia PA USA
20. Schulich School of Medicine and Dentistry, Pediatric Oral Health and Dentistry London ON Canada
21. Departments of Medicine & Orthopaedic Surgery, Center for Research in FOP & Related Disorders, The Perelman School of MedicineUniversity of Pennsylvania Philadelphia PA USA