1Department of Occupational and Environmental Medicine, College of Medicine, Dong-A University, Korea. kimji@dau.ac.kr
2Department of Occupational and Environmental Medicine, College of Medicine, Koshin University, Korea.
3Department of Occupational and Environmental Medicine, College of Medicine, Pusan Paik Hospital, In-Je University, Korea.
4Department of Preventive and Occupational Medicine, College of Medicine, Pusan National University, Korea.
5Department of Pathology, College of Medicine, Pusan National University, Korea.
6Department of Preventive Medicine and The Research Society of Environmental Genetic Epidemiology, College of Medicine, Dong-A University, Korea.