1. Department of Occupational and Environmental Medicine, International St. Mary’s Hospital, Catholic Kwandong University, Incheon, Korea.
2. Graduate School of Public Health and Healthcare Management, The Catholic University of Korea, Seoul, Korea.
3. Catholic Institute for Public Health and Healthcare Management, Seoul, Korea.
4. Department of Statistics, Dongguk University, Seoul, Korea.
5. Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency, Ulsan, Korea.
6. Department of Occupational and Environmental Medicine, Inha University, Incheon, Korea.
7. Department of Occupational and Environmental Medicine, College of Medicine, Hanyang University, Seoul, Korea.
8. Department of Occupational and Environmental Medicine, Yonsei University, College of Medicine, Seoul, Korea.
9. Hansung Health and Safety Technology Co., Ltd., Daejeon, Korea.
10. Department of Environmental Health, Korea National Open University, Seoul, Korea.