1. Department of Psychiatry, Kangnam St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, South Korea
2. Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
3. Department of Psychology, University of Leuven, Leuven, Belgium
4. Department of Psychiatry, Korea University, Seoul, South Korea
5. The Center for Rheumatic Diseases, Kangnam St. Mary's Hospital and Rheumatism Research Center, The Catholic University of Korea College of Medicine, Seoul, South Korea
6. Department of Liaison Psychiatry, University Hospitals Leuven, Leuven, Belgium