Affiliation: | 2. Orthopaedic and Arthritis Center for Outcomes Research, Department of Orthopedic Surgery, Brigham and Women''s Hospital, Harvard Medical School, Boston, MA, USA;3. Division of Rheumatology, Immunology and Allergy, Brigham and Women''s Hospital, Harvard Medical School, Boston, MA, USA;4. Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA |