About the Authors

Ulrich Heininger

ulrich.heininger@ukbb.ch

Affiliation University of Basel Children's Hospital (UKBB), Basel, Switzerland

Philippe André

Affiliation Service d'Hygiène, Epidémiologie et Prévention, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France

Roman Chlibek

Affiliation Department of Epidemiology, University of Defence, Hradec Kralove, Czech Republic

Zuzana Kristufkova

Affiliation Faculty of Public Health, Slovak Medical University, Bratislava, Slovakia

Kuulo Kutsar

Affiliation Estonian Health Board, Tallinn, Estonia

Atanas Mangarov

Affiliation Hospital for Infectious Diseases, Sofia, Bulgaria

Zsófia Mészner

Affiliation National Institute of Health Promotion, Paediatric Directorate, Budapest, Hungary

Aneta Nitsch-Osuch

Affiliation Department of Family Medicine, Medical University of Warsaw, Warsaw, Poland

Vladimir Petrović

Affiliation Institute for Public Health of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia

Roman Prymula

Affiliation University Hospital, Hradec Kralove, Czech Republic

Vytautas Usonis

Affiliation Clinic of Children’s Diseases, Faculty of Medicine, Vilnius University, Vilnius, Lithuania

Dace Zavadska

Affiliation Department of Paediatrics, Riga Stradins University, Riga, Latvia

Competing Interests

The authors of this manuscript read the journal's policy and have the following competing interests: This study was funded by Sanofi Pasteur, Lyon, France. UH: received honoraria for educational activities from Sanofi Pasteur, Pfizer, and InfectoPharm. PA: employee of Sanofi Pasteur, as senior epidemiologist, between 2004 and 2013. RC: received research grants as clinical trial investigator from GlaxoSmithKline and Pfizer. AM: acted as a consultant for Sanofi Pasteur, GlaxoSmithKline, Pfizer, Danone, Nestle Abbott, Merck Sharp & Dohme and has received grants to attend scientific events. AN-O: acted as a consultant and a lecturer for Sanofi Pasteur and GlaxoSmithKline. RP: received research grants as principal investigator from GlaxoSmithKline, Sanofi Pasteur, Novartis, Baxter and Pfizer. DZ: received lecture fees from GlaxoSmithKline, Sanofi Pasteur, Merck Sharp & Dohme, and Abbott and has received sponsorship from GlaxoSmithKline, Sanofi Pasteur and Baxter to attend scientific meetings. ZK, KK, ZM, VP and VU: no conflict of interest relevant to this manuscript. There are no patents, products in development or marketed products to declare. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: UH PA RC ZK KK AM ZM AN-O VP RP VU DZ. Performed the experiments: RC ZK KK AM ZM AN-O VP RP VU DZ. Analyzed the data: PA. Wrote the paper: UH PA RC ZK KK AM ZM AN-O VP RP VU DZ.