1. Department of Biological Sciences, National SunYat-Sen University, Kaohsiung, Taiwan
2. Section of Neurology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
3. Center of Geriatric Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
4. School of Medicine, National Yang Ming University, Taipei, Taiwan
5. Institute of Clinical Medicine, School of Medicine, National Chang Kung University, Tainan, Taiwan
6. Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan