Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPP1017031)
Received: 24 November 2017
Accepted: 29 June 2018
First Online: 27 July 2018
Ethics approval and consent to participate
: The London School of Hygiene & Tropical Medicine Research Ethics Committee granted ethical approval (reference 6088); the Ethiopian Federal Ministry of Science and Technology and Regional Health Bureaus of Amhara, Oromia, SNNP and Tigray regions; the Indian Council of Medical Research and SPECT-ERB in India; the Nigerian National Health Research Ethics Committee and Gombe State of Nigeria Ministry of Health Headquarters.All interviewees fully consented to take part in the study.
: Not applicable as no individual data are presented.
: The authors declare that they have no competing interests.
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