1Department of Orthopedics, Rhode Island Hospital/Hasbro Children's Hospital, Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA
2Department of Pediatrics, Rhode Island Hospital/Hasbro Children's Hospital, Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA
3Department of Radiology, Rhode Island Hospital/Hasbro Children's Hospital, Warren Alpert Medical School, Brown University, Providence, 2 Dudley Street, Suite 200, Providence, Rhode Island 02905, USA
4Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA