1. Aging and Health Research Center; National Yang Ming University; Taiwan
2. Institute of Public Health; National Yang Ming University; Taipei City Taiwan
3. Department of Family Medicine; Taipei Veterans General Hospital Yuanshan Branch, Yilan county; Taiwan
4. Center for Geriatrics and Gerontology; Kaohsiung Veterans General Hospital; Kaohsiung City Taiwan
5. Center for Geriatrics and Gerontology; Taipei Veterans General Hospital; Taiwan
6. Health Promotion Administration; Ministry of Health and Welfare; Taipei City Taiwan