1. Department of Psychiatry; Taipei Veterans General Hospital; New Taipei City Taiwan
2. Department of Psychiatry; Shuang Ho Hospital; New Taipei City Taiwan
3. Center for Geriatrics and Gerontology; Taipei Veterans General Hospital; New Taipei City Taiwan
4. Division of Psychiatry, School of Medicine; National Yang-Ming University; New Taipei City Taiwan
5. Department of Geriatric Psychiatry and General Clinical Research Center; Jianan Mental Hospital; Tainan