1. Department of Orthopedics, Chi-Mei Medical Center, Tainan, Taiwan
2. Department of Biomedical Engineering, National Yang Ming Chiao Tung University, Taipei, Taiwan
3. National Center for Geriatrics and Welfare Research, National Health Research Institutes, Yunlin, Taiwan
4. Department of Nursing, Hungkuang University, Taichung, Taiwan
5. Division of Hematology-Oncology, Department of Internal Medicine, Chi Mei Medical Center, Liouying, Tainan, Taiwan.