1. Department of Neuropsychiatry, Presbyterian Medical Center, Jeonju, Republic of Korea.
2. Department of Psychiatry, Kern Medical Center, Bakersfield, CA, USA.
3. California State University at Bakersfield, Bakersfield, CA, USA.
4. Department of Psychiatry, Chonbuk National University Hospital and Research Institute of Clinical Medicine, Jeonju, Republic of Korea.
5. Department of Psychiatry, Chonbuk National University Medical School and Institute for Medical Sciences, Jeonju, Republic of Korea.