Geung Jung Sohn, MD, Hyun Ju Kim, MD, PhD, Suk-Hoon Kang, MD, Myung Ho Lim, MD, PhD, Hae Gyung Chung, MD, Jin Hee Choi, MD, Tae Yong Kim, MD, PhD, and Hyungseok So, MD Department of Psychiatry, Korean Veteran Health Service Medical Center, Seoul, Korea 2 Department of Occupational & Environmental Medicine, Mokdong Hospital, Ewha Womans University, Seoul, Korea 3 Department of Psychology, College of Public Human Resources, Dankook University, Cheonan, Korea