1. Department of Pediatrics, Eskisehir Osmangazi University Faculty of Medicine, Eskisehir, Turkey
2. Vaccine Evaluation Unit, Public Health England, Manchester, UK
3. Department of Pediatrics, Santa Casa De São Paulo, School of Pediatrics, São Paulo, Brazil
4. Centre for the Evaluation of Vaccination, Vaccine & Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
5. Departments of Pediatrics and Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA