1. Department of Psychiatry, The Catholic University of Korea College of Medicine, Seoul, Korea.
2. International Health Care Center, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
3. Department of Psychiatry, College of Medicine, Korea University, Seoul, Korea.
4. Department of Psychiatry and Behavioural Sciences, Duke University Medical Center, Durham, NC, USA.
5. Global Medical Education, New York, NY, USA.