Received: 30 October 2020
Accepted: 9 April 2021
First Online: 23 April 2021
: All participants signed an informed consent form. The Ethics Committee of the Sudanese Federal Ministry of Health approved the study. All methods were performed in accordance with the relevant guidelines and regulations. Blood samples were collected by a well-trained medical nurse.
: Not applicable.
: The authors confirm that this article content has no conflict of interest.