1 Department of Health Promotion and Health Education, National Taiwan Normal University, Taipei, Taiwan; Department of Community Medicine and Long-Term Care, National Taiwan University Hospital Bei-Hu Branch, Taipei, Taiwan.
2 Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital Bei-Hu Branch, Taipei, Taiwan; Department of Physical Medicine and Rehabilitation, College of Medicine, National Taiwan University, Taipei, Taiwan.
3 Department of Family Medicine, National Taiwan University Hospital, Taipei, Taiwan; Department of Family Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
4 Department of Geriatrics and Gerontology and Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
5 Department of Nursing, Hungkuang University, Taichung, Taiwan.
6 Department of Family Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
7 Department of Health Promotion and Health Education, National Taiwan Normal University, Taipei, Taiwan. Electronic address: fongchingchang@ntnu.edu.tw.