1. Department of Orthopaedic SurgeryPerelman School of Medicine, University of PennsylvaniaPhiladelphia Pennsylvania USA
2. Center for Research in FOP and Related Disorders, Perelman School of Medicine, University of PennsylvaniaPhiladelphia Pennsylvania USA
3. Department of MedicinePerelman School of MedicineUniversity of PennsylvaniaPhiladelphia Pennsylvania USA
4. Department of GeneticsPerelman School of MedicineUniversity of PennsylvaniaPhiladelphia Pennsylvania USA