1. Department of Orthopaedic Surgery, Hospital for Special Surgery, Weill Cornell Medicine, New York City, NY
2. Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Berlin, Germany
3. Department of Orthopedic Surgery, University of Ulm, Ulm, Germany
4. Biostatistics Core, Hospital for Special Surgery, New York City, NY
5. Department of Orthopaedic Surgery, School of Medicine, Showa University Hospital, Tokyo, Japan
6. Hospital for Special Surgery, New York City, NY
7. Weill Cornell Medical College, New York, NY