1. Department of Rheumatology Dongfang Hospital, Beijing University of Chinese Medicine Beijing China
2. Department of Orthopedics, Cishan Hospital Ministry of Health and Welfare Kaohsiung Taiwan
3. Institute of Medical Science and Technology, National Sun Yat‐sen University Kaohsiung Taiwan
4. Department of Senior Services Industry Management Minghsin University of Science and Technology Hsinchu Taiwan
5. Department of Recreation and Sport Management Shu‐Te University Kaohsiung Taiwan
6. Department of Optometry Chung Shan Medical University Taichung 40201 Taiwan
7. Institute of Optometry Chung Shan Medical University Taichung 40201 Taiwan
8. Department of Medicine & Therapeutics The Chinese University of Hong Kong Hong Kong China