- 12 months A trained research assistant will administer a final set of questionnaires, measure participant's blood pressure according to the trial protocol, and repeat basic clinical measurements including anthropometry. Clinical records will be reviewed to capture intervening clinical events and changes in medical management. Participants who do not attend the 12 month follow-up clinic appointment will be followed up, and if cause for non-attendance is hospital admission or death, then hospital records or death certificate data will be obtained.