1. Department of Neurology, Capital Medical University School of Rehabilitation Medicine, China Rehabilitation Research Center, Beijing 100068, China.
2. Department of Orthopedics, The Seventh Medical Center of China General Hospital of People's Liberation Army, Beijing 100007, China.
3. College of Economics and Management, China Agricultural University, Beijing 100091, China.
4. Capital Medical University School of Basic Medical Sciences, Beijing 100069, China.
5. Faculty of Orthopedics, Chinese PLA General Hospital, National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Beijing 100039, China.
6. Department of Rheumatology & Immunology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China.