1. Institute of Neuroscience; National Yang-Ming University; Taipei Taiwan
2. Department of Radiology; MacKay Memorial Hospital; Taipei Taiwan
3. Department of Medicine; MacKay Medical College; Taipei Taiwan
4. Department of Biomedical Imaging and Radiological Sciences; National Yang-Ming University; Taipei Taiwan
5. Aging and Health Research Center; National Yang-Ming University; Taipei Taiwan
6. Center for Geriatrics and Gerontology; Taipei Veterans General Hospital; Taipei Taiwan
7. Department of Family Medicine; Taipei Veterans General Hospital Yuanshan Branch; Ilan Taiwan
8. Brain Research Center; National Yang-Ming University; Taipei Taiwan