1. Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, China
2. Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston
3. Boston University School of Medicine, Boston, Massachusetts
4. VA Boston Healthcare System, Boston, Massachusetts
5. Clinical Addiction Research and Education Unit, Boston University School of Medicine, Boston Medical Center, Boston, Massachusetts