Randomized clinical trial of supportive follow-up for cigarette smokers in a family practice.
D000293:Adolescent; D000328:Adult; D002986:Clinical Trials as Topic; D003376:Counseling; D005194:Family Practice; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008722:Methods; D009864:Ontario; D011897:Random Allocation; D000074606:Smoking Prevention