Received: 12 April 2017
Accepted: 10 April 2018
First Online: 23 April 2018
Ethics approval and consent to participate
: This is an analysis of free, publicly available secondary data, so formal ethical clearance was not needed. Permission to use and analyze the dataset was obtained by registering the project on the Demographic and Health Survey (DHS) website viaExternalRef removed.
: The authors declare that they have no competing interests.
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