1. Department of Psychiatry and Stress Research Institute, College of Medicine, Inje University, Seoul, Korea.
2. Department of Psychiatry, The Catholic University of Korea, Seoul, Korea.
3. Department of Medical Engineering, The Catholic University of Korea, Seoul, Korea.
4. Department of Radiology, The Catholic University of Korea, Seoul, Korea.
5. Department of Nuclear Medicine, The Catholic University of Korea, Seoul, Korea.