1. Orthopaedic Surgery, Hospital for Special Surgery, New York, NY, USA
2. Clinical Epidemiology, Hospital for Special Surgery, New York, NY, USA
3. Department of Orthopaedic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA
4. Foot and Ankle Service, Hospital for Special Surgery, New York, NY, USA
5. Weill Cornell Medical College, New York, NY, USA
6. Hospital for Special Surgery, New York, NY, USA