| Affiliation: | 1. International Vaccine Institute, Seoul, Korea;2. Department of Pharmacy Practice, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, USA;3. Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, Michigan, USA;4. Department of Pediatrics, College of Medicine, Korea University, Seoul, Korea;5. Department of Pediatrics, National Medical Center, Seoul, Korea;6. Department of Pediatrics, Inje College of Medicine, Seoul, Korea |
