About the Authors
London School of Hygiene and Tropical Medicine, London, United Kingdom
Biomedical Research and Training Institute, Harare, Zimbabwe
National Institute of Health Research, Harare, Zimbabwe
Department of Medical Laboratory Sciences, University of Zimbabwe, Harare, Zimbabwe
The authors have declared that no competing interests exist.
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.