Text and Data Mining valid from 2019-10-30
Received: 20 July 2019
Accepted: 16 September 2019
First Online: 30 October 2019
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. The consent is available at ExternalRef removed.
: Not applicable
: The authors declare that they have no competing interests.