“…People with high-income will have higher compliance and retention [9-11,15-18,28,29,31,36,37,40,45,48,49,58,59,61-63,65,71,72,80,81,85,87- Trust for the trial The more trust, the higher compliance and retention [9,11,12,14,[16][17][18][19]27,29,31,32,36,38,41,45,47,48,53,55,58,61,63,64,69,71,73,79,[81][82][83]…”