1. Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
2. Department of Orthopedics, Bayannaoer City Hospital, Bayannaoer City, Inner Mongolia, China
3. Department of Geriatric, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
4. Department of Basic Medical Sciences, Beijing University of Chinese Medicine, Beijing, China
5. Department of Orthopedics, China-Japan Friendship Hospital, Beijing University of Chinese Medicine, Beijing, China