Family physicians were randomly selected and approached to participate in CHAT. Paired cluster randomization was used, with practices as the unit of randomization. Data on blood pressure (BP) readings in the last year, diagnosis of hypertension, diagnosis of diabetes and/or target organ damage, and a current antihypertensive profile was extracted from the health records of 55 patients randomly selected in each practice. In practices allocated to the Intervention group, physicians sent a letter, with assistance from research staff, to invite all of their eligible patients 65 years and older to attend one or two BP sessions in nearby pharmacies. Inclusion criteria required that patients be regular patients in the practice, community-dwelling, and mobile/well enough to attend community sessions.