Funding for this research was provided by:
Received: 8 June 2020
Accepted: 17 November 2020
First Online: 30 November 2020
Ethics approval and consent to participate
: Ethical approval for this study was obtained from the ethical and technical review board, directorate of health research, Sudan federal ministry of health. Written consent was obtained from the study participant after informing them with the study objective, procedures, and their full right to participate or withdraw their consent at any time.
: Not applicable.
: Authors declare that they have no competing interests.