1. Department of Orthopaedic Surgery, Division of Physical Medicine & Rehabilitation, Stanford Health Care, 450 Broadway St, M/C 6342, Redwood City, CA 94063
2. The Micheli Center for Sports Injury Prevention, Waltham, MA; Department of Orthopaedic Surgery, Division of Sports Medicine, Boston Children's Hospital, Boston, MA; Harvard Medical School, Boston, MA
3. Department of Orthopaedic Surgery, Division of Sports Medicine, Boston Children's Hospital, Boston, MA
4. The Micheli Center for Sports Injury Prevention, Waltham, MA; Department of Orthopaedic Surgery, Division of Sports Medicine, Boston Children's Hospital, Boston, MA; Department of Medicine, Division of Emergency Medicine, Boston Children's Hospital, Boston, MA; Harvard Medical School, Boston, MA