Text and Data Mining valid from 2020-02-18
Received: 21 October 2019
Accepted: 13 February 2020
First Online: 18 February 2020
Ethics approval and consent to participate
: The study was approved by the Federal Ministry of Health, Sudan. Written informed consent was obtained from each individual who was willing to participate in the study. All experimental procedures were performed following the IRB approved protocol.
: Not applicable.
: The authors declare that they have no competing interests.