Text and Data Mining valid from 2018-07-11
Received: 18 April 2018
Accepted: 2 July 2018
First Online: 11 July 2018
Ethics approval and consent to participate
: The study used a secondary data and the local ethics committee at the Ethiopian Public Health Institute ruled that no formal ethical approval is required. We used de-identified data (summary data without individuals identity) to ensure confidentiality.
: 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.