[Smoking cessation: challenges to be faced].
Santos
Ubiratan de Paula
Ude P
D000293:Adolescent; D000328:Adult; D006801:Humans; D016540:Smoking Cessation / Q000379:methods / Q000523:psychology / Q000706:statistics & numerical data; D014029:Tobacco Use Disorder / Q000209:etiology / Q000628:therapy; D055815:Young Adult