, Kuck-Hyun Woo1, Jin-Seok Kim1, Seong-Yong Cho1, Sung-Soo Lee2, Hyun-Sul Lim3, Yeon-Soon Ahn4, Won-Ho Yang5 1Department of Occupational and Environmental Medicine, Soonchunhyang University Gumi Hospital, 179, Gongdan 1-dong, Gumi-si, Gyeongbuk 730-706 South Korea JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/