Funding for this research was provided by:
Centers for Disease Control and Prevention (COAG#U2GPS002047)
Received: 5 April 2019
Accepted: 29 July 2019
First Online: 8 August 2019
Ethics approval and consent to participate
: Ethical approvals were obtained from the University of Washington Human Subjects Division, the Kenya Medical Research Institute Ethical Review Committee, and the Associate Director for Science at the U.S. Centers for Disease Control and Prevention. All participants provided written informed consent prior to enrollment in the study.
: Not applicable.
: The authors declare that they have no competing interests.