Received: 31 October 2019
Accepted: 23 March 2020
First Online: 6 April 2020
Ethic approval and consent to participate
: Ethical clearance for this study was provided by the Ethics Committee of the Faculty of Medicine, Pharmacy, and Odontostomatology, University of Bamako (N°2011/77/FMPOS). Written informed consent was obtained from all participants aged ≥ 18 years, or the parents or guardians of individuals aged < 18 years. In addition, written assent was obtained from children aged 12 to 17 years prior the enrollment in the study.
: All authors read and approved the final revised manuscript.
: The authors declare that they have no competing interests.