Article History
Received: 28 December 2019
Accepted: 23 April 2020
First Online: 7 May 2020
Ethics approval and consent to participate
: The Kenya Medical Research Institute approved the study proposal to be conducted under ongoing research of the Nagasaki University Health Demographic Surveillance System in Suba, Kenya. Approval of the National Committee for Science, Technology and Innovation was then obtained (serial number: A5419). Written informed consent was also obtained in advance from each participant.
: Not applicable.
: No potential conflict of interest was reported by the authors.