Randomization, Masking, and Development of the Intervention
At the end of the baseline survey, the interviewers connected participants to WhatsApp, a messaging application (Meta), used for the intervention system. Participants were then randomized evenly to either the intervention group or the control group by a randomization algorithm that was built into the intervention system. The automated randomization occurred online, and the randomized group was concealed from the research team.Details of the intervention development are shown in eAppendix 1 in 