Funding for this research was provided by:
Japan Society for the Promotion of Science (16K21233 and 19K07526)
Received: 22 January 2021
Accepted: 13 May 2021
First Online: 25 May 2021
: The study was approved by the Kwilu Province Division of Health (N° ADM/707/01/DPS-KLU/CD/JPBK/632/2018), the Kinshasa School of Public Health Ethical Committee (ESP/CE/015/2019) and the School of Tropical Medicine and Global Health Ethical Review Committee.Written and verbal voluntary informed consent was obtained from all study participants including guardian/parents of non-adult participants.
: Not applicable.
: The authors declare that they have no competing interests.