Received: 27 December 2019
Accepted: 4 May 2020
First Online: 15 May 2020
Ethics approval and consent to participate
: The study was approved by the Gabonese National Ethics Committee and the Ministry of Health (PROT N° 0020/2015/SG/CNE). Stool and blood samples were collected from children after obtaining their parents’ or guardians’ written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.