Received: 20 April 2017
Accepted: 8 February 2018
First Online: 26 February 2018
Ethics approval and consent to participate
: The study was approved by the Amhara National Regional Ethical Review Board. A support letter by college of health sciences-Debre Tabor University was written to the DTGH to request the usage of data for research purposes only. Confidentiality of the data was maintained.
: Not applicable.
: The authors declare that they have no competing interests.