Randomization
Our study participants were randomly assigned in a 1:1 ratio to each group and divided into blocks 6, 8 and 12. A trained research assistant collected data using a computer-generated random number sequence previously prepared by the researcher, which was stored in an opaque sealed envelope. Each participant received an explanation of the study from a research assistant and was enrolled after providing written informed consent. They were asked to complete the study questionnaire, each taking approximately 20 min to complete. Participants received remuneration equivalent to 4–5 USD after each completed questionnaire to reduce attrition. Participants were blinded to their groups, and medical care providers, and the team of data monitoring and analysis were blinded to group assignments.