1. Baihe Veterans Home, Tainan City, Taiwan.
2. Department of Family Medicine, Taipei Veterans General Hospital, Taipei City, Taiwan.
3. School of Medicine, National Yang-Ming University, Taipei City, Taiwan.
4. Institute of Public Health, National Yang-Ming University, Taipei City, Taiwan.
5. Department of Radiology, Taipei Veterans General Hospital, Taipei City, Taiwan.
6. Institute of Clinical Medicine, National Yang-Ming University, Taipei City, Taiwan.
7. Institute of Hospital and Health Care Administration, National Yang-Ming University, Taipei City, Taiwan.