About the Authors

Caroline Free

caroline.free@lshtm.ac.uk

Affiliation Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, United Kingdom

Gemma Phillips

Affiliation Department of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, United Kingdom

Louise Watson

Affiliation Department of Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Leandro Galli

Affiliation Warwick University, Coventry, United Kingdom

Lambert Felix

Affiliation Department of Primary Care and Public Health, Imperial College, London, United Kingdom

Phil Edwards

Affiliation Department of Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Vikram Patel

Affiliation Department of Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Andy Haines

Affiliation Department of Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Competing Interests

VP is a member of the Editorial Board of PLOS Medicine. The authors have declared that no other competing interests exist.

Author Contributions

Conceived and designed the experiments: CF AH PE GP VP. Performed the experiments: GP LW LG LF CF PE. Analyzed the data: LW. Contributed reagents/materials/analysis tools: GP. Wrote the first draft of the manuscript: CF. Contributed to the writing of the manuscript: CF AH PE GP LW LG LF VP. ICMJE criteria for authorship read and met: CF AH PE GP LW LG LF VP. Agree with manuscript results and conclusions: CF AH PE GP LW LG LF VP.