1. Department of Pediatrics, Weill Cornell Medical College, New York, New York
2. Division of Orthopedics & Sports Medicine, Boston Children’s Hospital, Boston, Massachusetts
3. Harvard Medical School/Division of Musculoskeletal Ultrasound, Boston Children’s Hospital, Boston, Massachusetts
4. Institute for Sports Medicine, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois
5. Northwestern University Feinberg School of Medicine, Chicago, Illinois