1. Boston Children's Hospital, 319 Longwood Ave, Boston, MA 02115
2. Brown University Warren Alpert Medical School, Departments of Orthopedics and Pediatrics, Rhode Island Hospital, Providence, RI
3. New England Baptist Hospital, Boston, MA
4. Division of Sports Medicine, Department of Orthopedics, Boston Children's Hospital, 319 Longwood Ave, Boston, MA 02115; Harvard Medical School, Boston, MA; Northeastern University, Boston, MA; The Micheli Center for Sports Injury Prevention, Waltham, MA