Text and Data Mining valid from 2020-05-05
Received: 22 January 2020
Accepted: 14 April 2020
First Online: 5 May 2020
Ethics approval and consent to participate
: This study was approved by the ethical committee of Orotta College of Medicine and Health Sciences, Asmara, Eritrea. Written informed consent was taken from the participants before conducting the study.
: Not applicable.
: The authors declare that they have no competing interests.