About the Authors

Elizabeth L Corbett

To whom correspondence should be addressed. E-mail: elc1@mweb.co.zw

Affiliations London School of Hygiene and Tropical Medicine, London, United Kingdom , Biomedical Research and Training Institute, Harare, Zimbabwe

Tsitsi Bandason

Affiliation Biomedical Research and Training Institute, Harare, Zimbabwe

Yin Bun Cheung

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

Shungu Munyati

Affiliation National Institute of Health Research, Harare, Zimbabwe

Peter Godfrey-Faussett

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

Richard Hayes

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

Gavin Churchyard

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

Anthony Butterworth

Affiliations London School of Hygiene and Tropical Medicine, London, United Kingdom , Biomedical Research and Training Institute, Harare, Zimbabwe

Peter Mason

Affiliations Biomedical Research and Training Institute, Harare, Zimbabwe , Department of Medical Laboratory Sciences, University of Zimbabwe, Harare, Zimbabwe

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

ELC, SM, RH, GC, and AB designed the study. ELC, TB, YBC, SM, PGF, RH, and AB analyzed the data. ELC, TB, YBC, SM, PGF, RH, GC, AB, and PM contributed to writing the paper. PM was responsible for all of the laboratory data and for ethical approval and monitoring of ethical issues regarding patients.