1. Department of Orthopaedic Surgery, University of California–San Francisco, San Francisco, California
2. Department of Orthopaedic Surgery, VOICES Health Policy Research Center, Stanford University, Redwood City, California
3. University Orthopedics, Inc., East Providence, Rhode Island
4. Department of Orthopaedic Surgery, University of Colorado, Aurora, Colorado
5. Department of Orthopaedics, Harvard Combined Orthopaedics Residency Program, Massachusetts General Hospital, Boston, Massachusetts
6. Shriners Hospitals for Children–Philadelphia, Philadelphia, Pennsylvania
7. Division of Plastic and Reconstructive Surgery, Stanford University, Palo Alto, California
8. Division of Plastic Surgery, Cedars Sinai, Los Angeles, California
9. Department of Epidemiology & Biostatistics, University of California–San Francisco, San Francisco California