Randomization
At enrollment, participants were randomized 2:1 to an intervention group (of which there were 2, with an additional 1:1 assignment) or the control group using opaque envelopes opened in the presence of research staff. The randomization list was prepared using variable block sizes by the study statistician (K.K.T.), who was not otherwise involved in participant contact. Participants and study staff were unmasked to the randomization assignment due to the nature of the intervention.