1 Orthopedic and Arthritis Center for Outcomes Research, Brigham and Women's Hospital, Boston, MA, USA.
2 UBMD Department of Orthopedics and Sports Medicine, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA.
3 Harvard Medical School, Boston, MA, USA.
4 Department of Orthopedic Surgery, Brigham and Women's Hospital, Boston, MA, USA.
5 Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Boston, MA, USA.