1. Department of Psychiatry, Pusan National University Yangsan Hospital, Yangsan 50612, South Korea
2. Department of Psychiatry, Pusan National University School of Medicine, Yangsan 50612, South Korea
3. Department of Obstetrics & Gynecology, Pusan National University Yangsan Hospital, Yangsan 50612, South Korea
4. Ilsin Christian Hospital, Busan 48724, South Korea
5. Medical Research Institute, Pusan National University Hospital, Yangsan 50612, South Korea
6. Department of Information Management Systems, Dong-A University, Busan 49236, South Korea