Text and Data Mining valid from 2018-09-05
Received: 14 December 2017
Accepted: 24 May 2018
First Online: 5 September 2018
Ethics approval and consent to participate
: Since secondary data was used no ethical approval was sought, however, permission was sought from Measure DHS for use of the data.
: The author declares that he has no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.