Article History
Received: 2 January 2019
Accepted: 16 December 2019
First Online: 19 December 2019
Ethics approval and consent to participate
: Ethics approval for this study was not required since the data are secondary and are available in the public domain. More details regarding DHS data and ethical standards are available at: ExternalRef removed.
: No consent to publish was needed for this study as we did not use any details, images or videos related to individual participants. In addition, the data used is available in the public domain.
: The authors declare that they have no competing interests.