Smoking quit lines work in clinical trials and actual practice.
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D002140:California; D002986:Clinical Trials as Topic; D003376:Counseling / Q000379:methods*; D015277:Hotlines; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D016540:Smoking Cessation / Q000379:methods*; D014029:Tobacco Use Disorder / Q000628:therapy; D016896:Treatment Outcome