1. Department of Psychiatry, Keelung Chang Gung Memorial Hospital, Keelung City, Taiwan
2. College of Medicine, Chang Gung University, Taoyuan, Taiwan
3. Community Medicine Research Center, Chang Gung Memorial Hospital, Keelung, Taiwan
4. Center for Aging and Population Health, Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
5. Department of Neurology, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
6. Institute of Neuroscience, National Yang-Ming University, Taipei, Taiwan
7. Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital, Keelung, Taiwan
8. Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan