Funding for this research was provided by:
African Union through the Pan African University of Basics Sciences, Technology and Innovation (PAUSTI).
Received: 18 June 2020
Accepted: 15 September 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: Not applicable.
: This manuscript does not contain any individual person’s data and further consent for publication is not needed.
: The authors declare that they have no competing interest.