1. Institute of Population Health Sciences; National Health Research Institutes; Miaoli County Taiwan
2. Program for Aging, College of Medicine; China Medical University; Taichung Taiwan
3. School of Physical Therapy and Center for Education and Research on Geriatrics and Gerontology; Chung Shan Medical University; Taichung Taiwan
4. Department of Family Medicine; National Cheng Kung University Hospital; Tainan Taiwan
5. Institute of Gerontology; National Cheng Kung University Medical College; Tainan Taiwan
6. Department of Geriatrics and Gerontology; National Taiwan University Hospital; Taipei Taiwan
7. Department of Internal Medicine; National Taiwan University Hospital; Taipei Taiwan
8. Graduate Institute of Biostatistics; College of Public Health; China Medical University; Taichung Taiwan
9. Department of Family Medicine; China Medical University Hospital; Taichung Taiwan
10. Department of Family Medicine; College of Medicine; National Taiwan University; Taipei Taiwan
11. Department of Health Services Administration; China Medical University and Hospital; Taichung Taiwan