PPKAY with standard booster
Patients allocated to PPKAY with Standard Booster underwent the same PPKAY process listed above. Patients provided a phone number where they could be reached, and, prior to patient discharge, this cell phone was tested by the study team to ensure it was working. After hospital discharge, one of the four standard motivational text messages was sent to participants’ cell phones (rotating messages weekly) until conducting the final follow-up.