About the Authors

Virginia Homfray

Affiliation Research Department of Infection and Population Health, University College London, London, United Kingdom

Clare Tanton

Affiliation Research Department of Infection and Population Health, University College London, London, United Kingdom

Robert F. Miller

Affiliation Research Department of Infection and Population Health, University College London, London, United Kingdom

Simon Beddows

Affiliation Virus Reference Department, Public Health England, London, United Kingdom

Nigel Field

Affiliation Research Department of Infection and Population Health, University College London, London, United Kingdom

Pam Sonnenberg

Affiliation Research Department of Infection and Population Health, University College London, London, United Kingdom

Kaye Wellings

Affiliation Centre for Sexual and Reproductive Health Research, London School of Hygiene and Tropical Medicine, London, United Kingdom

Kavita Panwar

Affiliation Virus Reference Department, Public Health England, London, United Kingdom

Anne M. Johnson

Affiliation Research Department of Infection and Population Health, University College London, London, United Kingdom

Catherine H. Mercer

c.mercer@ucl.ac.uk

Affiliation Research Department of Infection and Population Health, University College London, London, United Kingdom

Competing Interests

The authors have read the journal's policy and the authors of this manuscript have the following competing interests: AMJ has been a Governor of the Wellcome Trust since 2011. The other authors declare that they have no conflicts of interest.

Author Contributions

Conceived and designed the experiments: SB KP. Performed the experiments: SB KP. Analyzed the data: VH CT CHM. Wrote the paper: VH CT RFM SB NF PS KW KP AMJ CHM. Initial applicants for Natsal-3, wrote the study protocol and obtained funding: PS KW AMJ CHM. Designed the Natsal-3 questionnaire, applied for ethics approval, and undertook piloting of the questionnaire: CT NF PS KW AMJ CHM. Managed data: CT CHM. All authors interpreted data: VH CT RFM SB NF PS KW KP AMJ CHM.