 Thus, after the first visit and randomization, patients from the phone calls group were invited to enroll by telephone in the program called Biosintética Assistance supported by Biosintética Laboratory. The patients who subscribed started receiving active telephone calls from appropriately trained operators as well as magazines with health-related information, which were sent periodically by mail. There were 6 contacts by telephone during the study. The patient was reminded to attend the next visit; heshe received instructions about hypertension as well as any necessary clarifications. All the patients randomized to the phone calls group were invited to attend occasional informative lectures with the participation of a multidisciplinary team. 