1. Division of Neurology and Division of Geriatric Medicine, Department of Internal Medicine, Geriatric Medicine Center, Kaohsiung Veterans General Hospital, Kaohsiung
2. Division of Geriatric Medicine, Department of Family Medicine, Departments of Psychiatry and Family Physician, Center for Geriatrics & Gerontology, Taipei Veterans General Hospital, Taipei
3. School of Medicine, Faculty of Medicine, National Yang-Ming University, Taipei
4. Institute of Health and Welfare Policy, National Yang-Ming University, Taipei