About the Authors

Elizabeth N. Ssemanda

essemand@jhsph.edu

Affiliation Dana Center for Preventive Ophthalmology, Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, United States of America

Beatriz Munoz

Affiliation Dana Center for Preventive Ophthalmology, Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, United States of America

Emma M. Harding-Esch

Affiliation London School of Hygiene and Tropical Medicine, London, United Kingdom

Tansy Edwards

Affiliation London School of Hygiene and Tropical Medicine, London, United Kingdom

Harran Mkocha

Affiliation Kongwa Trachoma Project, Kongwa, Tanzania

Robin L. Bailey

Affiliation London School of Hygiene and Tropical Medicine, London, United Kingdom

Ansumana Sillah

Affiliation National Eye Care Programme, Gambian Department of State for Health and Social Welfare, Ministry of Health, Banjul, The Gambia

Dianne Stare

Affiliation Dana Center for Preventive Ophthalmology, Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, United States of America

David C. W. Mabey

Affiliation London School of Hygiene and Tropical Medicine, London, United Kingdom

Sheila K. West

Affiliation Dana Center for Preventive Ophthalmology, Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, United States of America

On behalf of PRET Project Team

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ENS HM SKW. Performed the experiments: BM HM DS SKW. Analyzed the data: ENS BM DS SKW. Contributed reagents/materials/analysis tools: ENS BM EMHE TE RLB AS DS DCWM SKW. Wrote the paper: ENS BM EMHE TE HM RLB DS DCWM SKW.