title: Psychological and pharmacological influences in cigarette smoking withdrawal: effects of nicotine gum and expectancy on smoking withdrawal symptoms and relapse.
mesh_terms: D000328:Adult; D002638:Chewing Gum; D005260:Female; D006801:Humans; D008297:Male; D009538:Nicotine / Q000008:administration & dosage*; D012718:Set, Psychology; D012907:Smoking; D013375:Substance Withdrawal Syndrome / Q000517:prevention & control / Q000523:psychology*
chemical_list: D002638:Chewing Gum; D009538:Nicotine