1. National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, General Hospital of Chinese PLA, Beijing, China, Xiangya Hospital of Central South University, Changsha, China, and Brigham and Women's Hospital, Boston, Massachusetts (H.L.)
2. Brigham and Women's Hospital, Boston, Massachusetts (K.Y., S.K.T.)
3. Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom (S.S.Z.)
4. Health Management Center, Xiangya Hospital of Central South University, Changsha, China (J.W.)
5. Xiangya Hospital of Central South University, Changsha, China (C.Z.)
6. Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts (B.Z.L.)
7. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, and Hunan Key Laboratory of Joint Degeneration and Injury, Changsha, China (G.L.)
8. National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, General Hospital of Chinese PLA, Beijing, China (P.T.)
9. Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts (D.H.S.)