Article History
Received: 15 January 2019
Accepted: 9 October 2019
First Online: 22 October 2019
Ethics approval and consent to participate
: Ethical clearance was not required for this study as the G-DHS data is an anonymised publicly available data.
: Not applicable.
: SS is staff of the NHIA. However, that did not influence the design or analysis of the study in anyway. All other authors declare that they have no competing interests.