1. Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Medical Research Institute, Busan, Korea
2. PET Imaging Center, Centre for Addiction and Mental Health, University of Toronto, Toronto, ON, Canada
3. Ilsong Institute of Life Science, Hayllym University, Anyang, Korea
4. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
5. Memory and Aging Center, Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
6. Department of Bio and Brain Engineering, KAIST, Daejeon, Korea