About the Authors

Isabelle Pruvost

Affiliations Univ Lille Nord de France, UDSL, Lille, France, Paediatric Emergency and Infectious Diseases Unit, CHU Lille, Lille, France

François Dubos

Affiliations Univ Lille Nord de France, UDSL, Lille, France, EA2694, Public Health, Epidemiology and Quality of Care, Lille, France, Paediatric Emergency and Infectious Diseases Unit, CHU Lille, Lille, France

Emmanuel Chazard

Affiliation Department of Biostatistics, CHU Lille, Lille, France

Valérie Hue

Affiliation Paediatric Emergency and Infectious Diseases Unit, CHU Lille, Lille, France

Alain Duhamel

Affiliations Univ Lille Nord de France, UDSL, Lille, France, EA2694, Public Health, Epidemiology and Quality of Care, Lille, France, Department of Biostatistics, CHU Lille, Lille, France

Alain Martinot

alain.martinot@chru-lille.fr

Affiliations Univ Lille Nord de France, UDSL, Lille, France, EA2694, Public Health, Epidemiology and Quality of Care, Lille, France, Paediatric Emergency and Infectious Diseases Unit, CHU Lille, Lille, France

Competing Interests

The authors received funding from a commercial source (Sanofi-Pasteur MSD pharmaceuticals, France). 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: IP FD AM. Performed the experiments: IP FD VH AM. Analyzed the data: IP EC AD. Contributed reagents/materials/analysis tools: IP FD AD AM. Wrote the paper: IP FD EC VH AD AM.