1. Center for Geriatrics and Gerontology; Taipei Veterans General Hospital; No. 201, Sec. 2, Shih-Pai Rd Taipei 11217 Taiwan
2. Aging and Health Research Center; National Yang Ming University; No. 155, Sec. 2, Linong St Taipei 11221 Taiwan
3. Department of Geriatric Medicine; National Yang Ming University School of Medicine; No. 155, Sec. 2, Linong St Taipei 11221 Taiwan
4. Department of Family Medicine; Taipei Veterans General Hospital Yuanshan Branch; No. 386 Rongguang Rd., Yuanshan Township Yilan County 264 Taiwan