About the Authors

Asa K. Hedman

Contributed equally to this work with: Asa K. Hedman, Ming-Shi Li

Affiliation Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary’s Campus, London, United Kingdom

Ming-Shi Li

Contributed equally to this work with: Asa K. Hedman, Ming-Shi Li

ming-shi.li@imperial.ac.uk

Affiliation Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary’s Campus, London, United Kingdom

Paul R. Langford

Affiliation Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary’s Campus, London, United Kingdom

J. Simon Kroll

Affiliation Section of Paediatrics, Department of Medicine, Imperial College London, St. Mary’s Campus, London, United Kingdom

Competing Interests

This work was partly supported by Sanofi Pasteur. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials. None of the authors is directly employed by Sanofi Pasteur.

Author Contributions

Conceived and designed the experiments: AKH MSL JSK. Performed the experiments: AKH MSL. Analyzed the data: AKH MSL PRL JSK. Contributed reagents/materials/analysis tools: JSK. Wrote the paper: MSL PRL JSK.