1. Department of Statistics, Dongguk University , Seoul 04620 , Republic of Korea
2. Graduate School of Public Health and Healthcare Management, The Catholic University of Korea , Seoul 06591 , Republic of Korea
3. Department of Occupational and Environmental Medicine, International St. Mary’s Hospital, Catholic Kwandong University , Incheon 25601 , Republic of Korea
4. Chemical Safety Management Department, Nakdong River Basin Environmental Office, Ministry of Environment , Changwon 51439, Gyeongsangnam-do Province , Republic of Korea
5. Wonjin Institute for Occupational and Environmental Health , Seoul 02532 , Republic of Korea
6. Department of Environmental Health, Korea National Open University , Seoul 03087 , Republic of Korea