1. Department of Social and Child Welfare, Woosong University, Daejeon, Korea.
2. Department of Child and Family Welfare, University of Ulsan, Ulsan, Korea.
3. Department of Preventive Medicine, Ewha Medical Research Center, School of Medicine, Ewha Womans University, Seoul, Korea.
4. Institute of Environmental Medicine, Medical Research Center, Seoul National University, Seoul, Korea.
5. Department of Preventive Medicine, College of Medicine, Dankook University, Cheonan, Korea.
6. Department of Psychiatry, College of Medicine, Seoul National University, Seoul, Korea.
7. Environmental Health Research Division, National Institute of Environmental Research, Incheon, Korea.
8. Department of Obstetrics and Gynecology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
9. Department of Pediatrics, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
10. Department of Occupational and Environmental Medicine, College of Medicine, Dongguk University, Dongguk University Ilsan Hospital, Goyang, Korea.
11. Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.