1Department of Pathology, Yonsei University Wonju College of Medicine, Korea.
2Department of Preventive Medicine, Industrial Medical Center, The Catholic University of Korea, Korea. cyclor@catholic.ac.kr
3Department of Preventive Medicine and Institute of Occupational Medicine, Yonsei University Wonju College of Medicine, Korea.
4Department of Internal Medicine, Yonsei University Wonju College of Medicine, Korea. JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/