1. The American Sports Medicine Institute, Birmingham, AL, USA
2. The Och Spine Hospital at Columbia University, New York, NY, USA
3. Department of Radiology, University of California, Los Angeles Medical Center, Los Angeles, CA, USA
4. Verb Surgical, Santa Clara, CA, USA
5. The Johns Hopkins Biostatistics Center, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
6. Department of Orthopedic Surgery, Johns Hopkins School of Medicine, Baltimore, MD, USA