Text and Data Mining valid from 2019-02-01
Received: 26 November 2017
Accepted: 25 January 2019
First Online: 1 February 2019
Ethics approval and consent to participate
: The creation of WhatsApp groups was administratively authorized by the National, Provincial, and District Health authorities. Anonymity of group’s members was guaranteed. All WhatsApp group members gave their verbal consent after explanation of the group creation objectives.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.