Affiliation: | (1) Department Medicine, The University of Pennsylvania School of Medicine, Philadelphia, PA;(2) Department Genetics, The University of Pennsylvania School of Medicine, Philadelphia;(3) The Center for Research in FOP and Related Disorders, The University of Pennsylvania School of Medicine, Philadelphia, PA;(4) The Institute of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Vari, Greece;(5) Department of Orthopaedic Surgery, The University of Pennsylvania School of Medicine, Silverstein Two, 3400 Spruce St., 19104 Philadelphia, PA |