About the Authors

Martin W. G. Brinkhof, Ben D. Spycher, Matthias Egger
Division of International and Environmental Health, Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland

Constantin Yiannoutsos
Division of Biostatistics, Indiana University, Indianapolis, Indiana, United States of America

Ralf Weigel
Lighthouse Trust at Kamuzu Central Hospital and Ministry of Health, Lilongwe, Malawi

Robin Wood
Faculty of Health Sciences, Desmond Tutu HIV Centre, Institute for Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa

Eugène Messou
Programme PAC-CI, Abidjan, Côte d'Ivoire

Andrew Boulle
School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa

Jonathan A. C. Sterne
Department of Social Medicine, University of Bristol, Bristol, United Kingdom

Corresponding Author

egger@ispm.unibe.ch

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MWB ME JACS. Performed the experiments: MWB BS. Analyzed the data: MWB BS. Contributed reagents/materials/analysis tools: CTY RW RW EM AB JACS. Wrote the paper: MWB BS CTY RW RW EM AB ME JACS.