1. 1The Catholic University of Korea College of Medicine, Department of Psychiatry, Seoul, Republic of Korea
2. 2The Catholic University of Korea College of Medicine, Seoul St. Mary’s Hospital, International Health Care Center, Seoul, Republic of Korea
3. 3Korea University, College of Medicine, Department of Psychiatry, Seoul, Republic of Korea
4. 4Duke University Medical Center, Department of Psychiatry and Behavioural Sciences, Durham, NC, USA