1. Department of Pediatrics, Kosin University Gospel Hospital, Kosin University School of Medicine, Busan, Korea.
2. Department of Pediatrics, Hallym University Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Hwaseong, Korea.
3. Department of Pediatrics, Pusan National University Hospital, Busan, Korea.
4. Department of Pediatrics, Chungnam National University Sejong Hospital, Chungnam National University College of Medicine, Sejong, Korea.
5. Department of Pediatrics, Chuncheon Sacred Heart Hospital, Hallym University School of Medicine, Chuncheon, Korea.
6. Department of Occupational and Environmental Medicine, Seoul Medical Center, Seoul, Korea.
7. Korea University Graduate School of Public Health, Seoul, Korea.
8. Seoul Medical Book and Publishing, Jeju, Korea.
9. Biomedical Statistics Center, Research Institute for Future Medicine, Samsung Medical Center, Seoul, Korea.
10. Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
11. Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences & Technology, Seoul, Korea.