Received: 28 September 2021
Accepted: 16 December 2021
First Online: 11 January 2022
Change Date: 20 January 2022
Change Type: Update
Change Details: The tables' layout was corrected due to a typesetting error. The error was fixed.
: This study, including verbal informed consent procedure, was reviewed and approved by the Gambian Government/MRC Joint Ethics Committee (SCC1438v2, 1484v2, 1485v2) and the Institutional Review Board of the Institute of Tropical Medicine, Antwerp, Belgium (1046/15 and 1144/16). Verbal informed consent was obtained from all participants. All methods were carried out in accordance with relevant guidelines and regulations, including the Code of Ethics of the American Anthropological Association.
: Not applicable.
: The authors declare that they have no competing interests.