1. Department of Orthopaedic Surgery, Stanford University, Stanford, California, USA.
2. University of Washington School of Medicine, Seattle, Washington, USA.
3. College of Osteopathic Medicine, University of New England, Biddeford, Maine, USA.
4. University of Utah School of Medicine, Salt Lake City, Utah, USA.
5. Author deceased.
6. Tennessee Orthopaedic Alliance, Nashville, Tennessee, USA.
7. Department of Orthopaedic Surgery, Children’s Hospital of Pennsylvania, Philadelphia, Pennsylvania, USA.
8. Department of Orthopaedic Surgery, Boston Children’s Hospital, Boston, Massachusetts, USA.