About the Authors
London School of Hygiene and Tropical Medicine, London, United Kingdom
Médecins Sans Frontières, Brussels, Belgium
Imperial College London, London, United Kingdom
Médecins Sans Frontières, Geneva, Switzerland
University of Cape Town, Cape Town, South Africa
The authors have declared that no competing interests exist.
Analyzed the data: KS NF. Wrote the first draft of the manuscript: KS NF. Contributed to the writing of the manuscript: KS NF RVdB SF RH. ICMJE criteria for authorship read and met: KS NF RVdB SF RH. Agree with manuscript results and conclusions: KS NF RVdB SF RH. KS reviewed the literature, extracted the data and wrote the first draft of the paper. NF performed the analyses, co-wrote the paper and contributed to data extraction. RVdB contributed to data extraction and writing of the paper. RH and SF guided the concept of the paper and contributed to the writing of the paper.