1. Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Republic of Korea.
2. Department of Internal Medicine, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Republic of Korea.
3. Department of Psychiatry, Korea University College of Medicine, Seoul, Republic of Korea.
4. Department of Psychiatry, Gachon University School of Medicine, Incheon, Republic of Korea.