Ethics approval and consent to participate
This study was conducted in accordance with the Declaration of Helsinki, and approved by the Indiana University Institutional Review Board (#1507246903) and the Moi University Institutional Research Ethics Committee (#0001429). The research study was conducted in accordance with all the relevant guidelines and regulations regarding protection of human populations, including pregnant women, fetuses, and newborns. No research was conducted in regards to embryos, gametes, or stem cells. All adult participants provided written informed consent for themselves and their infants to participate in the study.