, Kuck-Hyun Woo2, Yang Ho Kim3 1Hanyang University College of Medicine, Seoul, Korea
2Soonchunhyang University College of Medicine, Gumi, Korea
3Ulsan University College of Medicine, Ulsan, Korea
4Department of Occupational and Environmental Medicine, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Korea JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/