About the Authors

Clarence C. Tam

To whom correspondence should be addressed. E-mail: clarence.tam@lshtm.ac.uk

Affiliations Infectious Disease Epidemiology Unit, Department of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom, Environmental and Enteric Diseases Department, Health Protection Agency Centre for Infections, London, United Kingdom

Sarah J. O'Brien

Affiliation Division of Medicine and Neuroscience, School of Medicine, University of Manchester, Salford, United Kingdom

Irene Petersen

Affiliation Department of Primary Care and Population Sciences, University College, London, London, United Kingdom

Amir Islam

Affiliation Department of Primary Care and Population Sciences, University College, London, London, United Kingdom

Andrew Hayward

Affiliation Department of Primary Care and Population Sciences, University College, London, London, United Kingdom

Laura C. Rodrigues

Affiliation Infectious Disease Epidemiology Unit, Department of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LR CT SO IP AI AH. Analyzed the data: CT. Wrote the paper: LR CT SO.