First Online: 29 May 2019
Ethics approval and consent to participate
: The Office of Human Research and Ethics at the University of North Carolina at Chapel Hill determined that this analysis of secondary data did not constitute human subjects research as defined under federal regulations, and therefore, did not require institutional review board approval. Consent and ethics approval were obtained by ICF Macro (the DHS Program) prior to data collection.
: Not applicable, there is no personally identifiable individual-level data.
: The authors declare that they have no competing interests.
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