1. Translational Pediatrics and Infectious Diseases, Pediatrics Department, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
2. Genetics, Vaccines and Pediatrics Research Group, University of Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain
3. Pfizer Vaccine Medical Development, Scientific & Clinical Affairs, Collegeville, PA, USA
4. Department of Pediatrics, Santa Casa de São Paulo School of Medical Sciences, São Paulo, Brazil