aMedical Research, Kenyatta National Hospital, Nairobi, Kenya;

bGlobal Health, University of Washington, Seattle, WA;

cBiostatistics, University of Washington, Seattle, WA;

dPediatrics and Child Health, University of Nairobi, Nairobi, Kenya;

eEpidemiology, University of Washington, Seattle, WA;

fPediatrics, University of Washington, Seattle, WA;

gMedicine University of Washington, Seattle, WA.

Correspondence to: Brenda Wandika, BScN-RN, MPH, Hospital Road, Nairobi 20723-00202, Kenya (e-mail: [email protected]).

Supported by National Institutes of Health (NIH), Fogarty International Center: 1K43TW011422-01A to IN. BW was supported by D43 TW009580.

The authors have no funding or conflicts of interest to disclose.

B.W. developed the first draft of the manuscript; I.N. conducted the data analysis. I.N., G.J.-S., D.W., and II developed the study protocol. I.N. obtained grant funding. F.N. and C.A. collected study data. I.N. developed study material and supervised data collection. All coauthors revised and approved the final draft of this manuscript.

The data that support the findings of this study are available from the corresponding author (B.W.) upon reasonable request.