1. Division of Health Policy Department of Public Health, Weill Cornell Medical College, New York, NY, USA
2. Epidemiology and Biostatistics Core, Hospital for Special Surgery, New York, NY, USA
3. Department of Orthopaedics, Hospital Universitario La Fe, Valencia, Spain
4. Department of Rheumatology, Hospital for Special Surgery, New York, NY, USA
5. Department of Orthopedic Surgery, Hospital for Special Surgery, 535 East 70th Street, 10021, New York, NY, USA