Text and Data Mining valid from 2018-09-03
Received: 18 January 2018
Accepted: 22 August 2018
First Online: 3 September 2018
Ethics approval and consent to participate
: The study was approved by institutional review board of SPHMMC ethical review board in accordance with Ethiopian national research ethics review guideline. They also approved that no needs of formal consent either verbally or written as the study was based on secondary data.
: Not applicable.
: The authors declare that they have no competing interests.
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