Received: 26 November 2020
Accepted: 2 March 2021
First Online: 10 May 2021
: This study is part of a doctoral thesis. The thesis project is submitted to the ethics committee of the University of Parakou (Benin). The free and informed written consent of all subjects included in the study was obtained. The data was treated confidentially.
: Not applicable.
: The authors state that there is no competing interest.