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.
5Korea Labor Welfare Corporation, Korea.
6Korea Occupational Safety and Health Research Institute, Korea.
7Department of Pathology School of Medicine, Kyungpook National University, Korea.
8Department of Pathology, Chonbuk National University, Medical School, Korea.
9Department of Pathology, Konyang University College of Medicine, Korea.
10Department of Pathology, College of Medicine, Kwandong University, Korea.