Received: 13 February 2020
Accepted: 10 June 2020
First Online: 14 September 2020
Availability of data and materials
: Supplementary data to this article are available and can be obtained if needed.
: The authors declare that they have no competing interests.
: Not applicable.
: The study was approved by the Catholic University of Bukavu Ethics and Research Committee (Reference: UCB/CIE/NC/002/2016). Each participant approved to participate in this study. At each step of the present study, confidentiality and anonymity rules were observed.