Affiliation: | a National Institute of Arthritis and Musculoskeletal and Skin Diseases, Rochester, New York, USA b University of Rochester Medical Center, Rochester, New York, USA c Rehabilitation Medicine Department, Warren G. Magnuson Clinical Center, Bethesda, MD 20892-1604, USA d NIH Biomechanics Laboratory, Building 10, Room 6s-235, Bethesda, MD 20892-1604, USA |