Text and Data Mining valid from 2019-06-11
Received: 5 December 2018
Accepted: 4 June 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the research and ethical committee of Adama Science and Technology University. Permission letter from the Adama City health office was maintained.
: The authors declare that they have no competing interests.