1 Department of Psychiatry, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Republic of Korea.
2 Department of Neuropsychiatry, Dongguk University Medical School, Dongguk University International Hospital, Goyang, Republic of Korea.
3 Mental Health Clinic, National Cancer Center, Goyang, Republic of Korea.
4 Department of Psychiatry, University of California, San Francisco, USA.
5 Department of Psychiatry, Seoul National University Hospital, Seoul, Republic of Korea; Institute of Human Behavioral Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea. Electronic address: aym@snu.ac.kr.