Funding for this research was provided by:
Bundesministerium für Gesundheit (NiCaDe: ZMVI1-2519GHP711 / D81667, GHPP/PPE)
Deutscher Akademischer Austauschdienst
China Scholarship Council
Received: 1 November 2019
Accepted: 8 January 2021
First Online: 15 January 2021
Ethics approval and consent to participate
: Informed consent of each participant was obtained before sample collection and the study was approved by the ethical review board of LAUTECH Teaching Hospital, Osogbo, Nigeria.
: Not applicable.
: The authors declare that they have no competing interests.