Text and Data Mining valid from 2020-03-16
Received: 18 November 2019
Accepted: 9 March 2020
First Online: 16 March 2020
Ethics approval and consent to participate
: The study doesn’t involve the collection of information from subjects. Consent to participate is not applicable. We sent a one-page proposal abstract of the study to the DHS program office. They gave permission to access the data with reference number of 131425.
: Not applicable
: The authors declare that they have no competing interests.