About the Authors

Sonia Saxena

s.saxena@imperial.ac.uk

Affiliation Department of Primary Care and Social Medicine, Imperial College London, London, United Kingdom

Alex Bottle

Affiliation Department of Primary Care and Social Medicine, Imperial College London, London, United Kingdom

Ruth Gilbert

Affiliation Centre for Evidence-based Child Health and MRC Centre of Epidemiology for Child Health, UCL-Institute of Child Health, London, United Kingdom

Mike Sharland

Affiliation Paediatric Infectious Diseases Unit, St George's Hospital NHS Trust, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SS REG ms. Analyzed the data: SS AB. Wrote the paper: SS AB REG ms.