1. Aging and Health Research Center, National Yang Ming University, Taipei 11211, Taiwan
2. Department of Family Medicine, Taipei Veterans General Hospital Yuanshan Branch, Yuanshan Township, Yilan County 264, Taiwan
3. Center for Geriatrics and Gerontology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
4. Center of Health and Aging, Hualien Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation, Hualien County 790, Taiwan