1Center for Research in FOP and Related Disorders, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
2Department of Orthopaedic Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
3Department of Genetics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
4Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
5Abramson Cancer Center, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
6Biomedical Informatics Facility, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
7Department of Orthopaedic Surgery, Seoul National University Children’s Hospital, Seoul National University College of Medicine, 28 Yeongeon-dong, Jongno-gu, Seoul 110-744, Republic of Korea
8Division of Developmental Medicine, Institute of Medical Genetics, University of Glasgow Medical School, Yorkhill Academic Campus, Glasgow G3 8SJ, Scotland, UK
9Department of Orthopaedic Surgery, Santa Casa de Misericórdia de São Paulo School of Medicine, Rua Dr. Cesário Motta Jr. 112, Cep: 01221- 020, São Paulo, Brazil
10Department of Genetics, Hoˆpital Necker-Enfants Malades, INSERM U-781, 149 Rue de Sèvres, 75015 Paris, France
11Department of Pediatrics, Klinikum Garmisch-Partenkirchen GmbH, D-82467 Garmisch-Partenkirchen, Germany
12Genetic Health Services Victoria, Department of Genetics, Royal Children’s Hospital, Melbourne, Australia
13Nuffield Department of Orthopaedic Surgery, Nuffield Orthopaedic Centre, Windmill Road, Headington, Oxford OX3 7LD, UK
14Institute of Musculoskeletal Sciences, Botnar Research Centre, Nuffield Orthopaedic Centre, University of Oxford, Oxford OX3 7LD, UK
15Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Marin, 64700 Hendaye, France
16Department of Surgery, Georgetown University School of Medicine, Washington, DC 20057, USA
17Department of Pediatrics, Georgetown University School of Medicine, Washington, DC 20057, USA
18Centre for Immunology and Cancer Research, Princess Alexandra Hospital, Ipswich Road, Woolloongabba, Queensland 4102, Australia
19Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA