Received: 4 February 2020
Accepted: 2 September 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: The study was approved by the College of medicine and health sciences Research ethical review committee of Adigrat University, Ethiopia (Consent Ref Number AGU/CMHS/044/2018 approval dated 07/04/2018 Official letter was obtained from Adigrat University (Consent Ref Number AGU/CMHS/RCSH/19/2018 approval dated 25/04/2018. Written informed consent was sought from each study participant before sample collection and maintained throughout the study. All participants were given code numbers to keep their identity confidential.
: Not applicable.
: The authors’ declared that there were no competing interests.