| Affiliation: | 2. Thurston Arthritis Research Center, University of North Carolina at Chapel Hill, 3300 Thurston Bldg., CB# 7280, Chapel Hill, NC 27599, USA;3. Department of Medicine, University of North Carolina at Chapel Hill, 125 MacNider Hall, CB# 7005 Chapel Hill, NC 27599, USA;4. Center for Health Services Research in Primary Care, Durham VA Medical Center, Durham, NC, USA;6. Injury Prevention Research Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA;5. Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA;11. Department of Orthopedic Surgery, Division of Physical Therapy, Duke University Medical Center, USA;12. Department of Orthopedics and Rehabilitation, University of Wisconsin–Madison, Madison, WI, USA;8. Department of Medicine, Division of Rheumatology, Duke University Medical Center, Durham, NC, USA;10. Physical Medicine and Rehabilitation Service, Durham VA Medical Center, Durham, NC, USA;9. Oregon Research Institute, Eugene, OR, USA;112. School of Nursing, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA |
