1. Department of Health Administration and Management; College of Medical Science; Soonchunhyang University; Asan Korea
2. Department of Occupational and Environmental Medicine; Dankook University Hospital; Cheonan Korea
3. Department of Preventive Medicine; Dankook University College of Medicine; Cheonan Korea
4. Department of Pediatrics; Samsung Medical Center; Environmental Health Center for Atopic Diseases; Sungkyunkwan University School of Medicine; Seoul Korea
5. Department of Pediatrics; Inje University College of Medicine; Seoul Korea
6. Department of Pediatrics; Hallym Sacred Heart Hospital; Hallym University College of Medicine; Anyang Korea
7. Department of Pediatrics; Konkuk University Hospital; Konkuk University School of Medicine; Seoul Korea
8. Department of Pediatrics; CHA University School of Medicine; Seongnam Korea
9. Department of Information and Statistics; Korea National Open University; Seoul Korea
10. Department of Social Medicine; Dankook University College of Medicine; Cheonan Korea