About the Authors

Fengchen Liu

Affiliation F.I. Proctor Foundation, University of California, San Francisco, California, United States of America

Travis C. Porco

travis.porco@ucsf.edu

Affiliations F.I. Proctor Foundation, University of California, San Francisco, California, United States of America, Department of Ophthalmology, University of California, San Francisco, California, United States of America, Department of Epidemiology and Biostatistics, University of California, San Francisco, California, United States of America

Kathryn J. Ray

Affiliation F.I. Proctor Foundation, University of California, San Francisco, California, United States of America

Robin L. Bailey

Affiliation Faculty of Infectious and Tropical Diseases, Clinical Research Department, London School of Hygiene and Tropical Medicine, London, United Kingdom

Harran Mkocha

Affiliation Kongwa Trachoma Project, Kongwa, Tanzania

Beatriz Muñoz

Affiliation Wilmer Eye Institute, Johns Hopkins Hospital, Baltimore, Maryland, United States of America

Thomas C. Quinn

Affiliation Johns Hopkins Center for Global Health, Johns Hopkins University, Baltimore, Maryland, United States of America

Thomas M. Lietman

Affiliations F.I. Proctor Foundation, University of California, San Francisco, California, United States of America, Department of Ophthalmology, University of California, San Francisco, California, United States of America, Department of Epidemiology and Biostatistics, University of California, San Francisco, California, United States of America

Sheila K. West

Affiliation Wilmer Eye Institute, Johns Hopkins Hospital, Baltimore, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TML TCP FL SKW. Performed the experiments: FL TCP TML SKW HM BM. Analyzed the data: FL TCP TML BM KJR RLB TCQ. Contributed reagents/materials/analysis tools: SKW TML TCP FL. Wrote the paper: TCP FL TML KJR SKW RLB. Contributed to the collection of clinical data: SKW BM HM. Contributed to the cleaning and management of data: BM.