Received: 3 November 2020
Accepted: 19 May 2021
First Online: 9 June 2021
: The protocol of this study received approval from the Ethics Committee of Ministry of Public Health of the Madagascar Republic (notification N° 50-MSAN/EC April the 26th 2016). The written informed consent to participate was obtained from all participants for this study. Consent to participate was obtained from the parents or guardian for all minors under the age of 16.
: Not applicable.
: The authors declare that they have no competing interests.