1. Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
2. Aging and Health Research Center, National Yang Ming University, Taipei, Taiwan
3. Department of Geriatric Medicine, National Yang Ming University, Taipei, Taiwan
4. Center for Geriatrics and Gerontology, Taipei Veterans General Hospital, Taipei, Taiwan
5. Center for Aging and Community Health, Hualien Tzu Chi Hospital, Hualien, Taiwan
6. School of Medicine, Tzu Chi University, Hualien, Taiwan