Stepped wedge design: Participants in each group of clusters and periods.
*3M: 3-month follow-up; 8M: 8-month follow-up; 8M data was collected only till period 4. Different participants were recruited in each of the groups of clusters for each period; 3M and 8M follow-up measurements were completed on the same recruited participants. Control condition: yellow square. Intervention condition: blue square.Participant demographic characteristics at baseline are shown in 