1. Department of Psychiatry, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
2. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
3. Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
4. Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana.
5. Scientific and Statistical Computing Core, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland.
6. Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.