About the Authors

Esmael Habtamu

esmael.ali@lshtm.ac.uk

Affiliations International Centre for Eye Health, London School of Hygiene and Tropical Medicine, London, United Kingdom, The Carter Center, Addis Ababa, Ethiopia

Tariku Wondie

Affiliation The Carter Center, Addis Ababa, Ethiopia

Sintayehu Aweke

Affiliation The Carter Center, Addis Ababa, Ethiopia

Zerihun Tadesse

Affiliation The Carter Center, Addis Ababa, Ethiopia

Mulat Zerihun

Affiliation The Carter Center, Addis Ababa, Ethiopia

Zebideru Zewdie

Affiliation Amhara Regional Health Bureau, Bahirdar, Ethiopia

Kelly Callahan

Affiliation The Carter Center, Atlanta, Georgia, United States of America

Paul M. Emerson

Affiliation International Trachoma Initiative, Atlanta, Georgia, United States of America

Hannah Kuper

Affiliation International Centre for Evidence in Disability, London School of Hygiene and Tropical Medicine, London, United Kingdom

Robin L. Bailey

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

David C. W. Mabey

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

Saul N. Rajak

Affiliation International Centre for Eye Health, London School of Hygiene and Tropical Medicine, London, United Kingdom

Sarah Polack

Affiliation International Centre for Evidence in Disability, London School of Hygiene and Tropical Medicine, London, United Kingdom

Helen A. Weiss

Affiliation Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom

Matthew J. Burton

Affiliation International Centre for Eye 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: EH PME HK SP HW MJB. Performed the experiments: EH TW SA ZT MZ ZZ MJB. Analyzed the data: EH HAW MJB. Wrote the paper: EH TW SA ZT MZ ZZ KC PME HK RLB DCWM SNR SP HAW MJB.