1. Vanderbilt Orthopaedic Institute, Vanderbilt University Medical Center, Nashville, Tennessee, USA
2. Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
3. Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio, USA
4. Department of Orthopaedic Surgery, Washington University School of Medicine at Barnes-Jewish Hospital, St Louis, Missouri, USA
5. Department of Orthopaedic Surgery, The Ohio State University School of Medicine, Columbus, Ohio, USA
6. Sports Medicine Division, Hospital for Special Surgery, New York, New York, USA
7. Department of Orthopaedic Surgery, University of Iowa School of Medicine, Iowa City, Iowa, USA
8. Department of Orthopaedic Surgery, University of Colorado School of Medicine, Denver, Colorado, USA