Smoking cessation.
D003216:Conditioning, Operant; D006801:Humans; D008722:Methods; D009538:Nicotine / Q000378:metabolism; D010551:Personality; D010555:Personality Inventory; D012657:Self-Help Groups; D012907:Smoking; D000074606:Smoking Prevention; D013997:Time Factors
D009538:Nicotine