1. Aging and Health Research Center, National Yang-Ming University, Taipei, Taiwan.
2. Institute of Public Health, National Yang-Ming University, Taipei Taiwan.
3. Center for Geriatrics and Gerontology, Taipei Veterans General Hospital, Taipei, Taiwan.
4. Institute of Biomedical Informatics, National Yang-Ming University, Taipei, Taiwan.
5. Department of Family Medicine, Taipei Veterans General Hospital Yuanshan Branch, Yilan City, Taiwan.