1. Translational Research Program in Pediatric Orthopaedics, Division of Orthopaedic Surgery, Department of Surgery; Children's Hospital of Philadelphia; Philadelphia Pennsylvania
2. McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perleman School of Medicine; University of Philadelphia; Philadelphia Pennsylvania
3. Department of Orthopaedic Surgery; Osaka City University Medical School; Osaka Japan