1. Department of Psychiatry, Soon Chun Hyang University Cheonan Hospital, Soon Chun Hyang University College of Medicine, Cheonan, Korea
2. Department of Preventive Medicine, Soon Chun Hyang University Cheonan Hospital, Soon Chun Hyang University College of Medicine, Cheonan, Korea
3. Division of Infectious Diseases, Department of Internal Medicine, Eulji University Graduate School, Daejeon, Korea