1. Department of Preventive Medicine, College of Medicine, Seoul National University, Seoul, Korea
2. Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing, China
3. Department of Preventive Medicine, College of Medicine, Jeju National University, Jeju, Korea
4. College of Pharmacy, Dongduk Women’s University, Seoul, Korea
5. Department of Biostatistics and Epidemiology, Graduate School of Public Health, Seoul National University, Seoul, Korea
6. Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Korea