Recruitment and Informed Consent
RECRUITMENT
Participants were recruited at the clinics while they waited for their antenatal appointments. As such, this was a convenience sample, recruited consecutively by research team members affiliated with the Clinton Health Access Initiative in South Africa. Members of the research team described the trial to mothers and gained informed consent for participation in the study from mothers who expressed an interest in taking part. During recruitment, participants were notified that their participation in the study was voluntary and that they could withdraw at any time without any threat or punitive measures. They were also notified that they would receive airtime vouchers to compensate them for their time and expenses incurred by participating in the study.