1. Division of Geriatric Medicine; Taipei Veterans General Hospital Yuanshan Branch; I-Lan Taiwan
2. Aging and Health Research Center; National Yang Ming University; Taipei Taiwan
3. Geriatric Medicine Center; Kaohsiung Veterans General Hospital; Taipei Taiwan
4. Center for Geriatrics and Gerontology; Taipei Veterans General Hospital; Taipei Taiwan
5. Department of Family Medicine; Kyung Hee University; Seoul South Korea
6. Office of Superintendent; Taipei Veterans General Hospital; Taipei Taiwan