About the Authors
Center for Global Health and Development, Boston University, Boston, Massachusetts, United States of America
Health Economics and Epidemiology Research Office, Wits Health Consortium, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: SR MPF. Performed the experiments: SR MPF. Analyzed the data: SR MPF. Contributed reagents/materials/analysis tools: SR MPF. Wrote the paper: SR MPF. ICMJE criteria for authorship read and met: SR MPF. Agree with the manuscript's results and conclusions: SR MPF. Wrote the first draft of the paper: SR.