1. Vaccines, Antivirals and Evidence Generation, Pfizer Inc, Collegeville, PA, USA
2. Children’s Hospital, Worms Clinic, Worms, Germany
3. Pediatric Infectious Diseases, University Medicine Mainz, Mainz, Germany
4. Department of Pediatrics, Santa Casa de São Paulo School of Medical Sciences, São Paulo, Brazil
5. Vaccines, Antivirals and Evidence Generation, Pfizer Ltd, Surrey, UK