title: Nicotine and smoking relapse.
mesh_terms: D002638:Chewing Gum; D006801:Humans; D009538:Nicotine; D000074606:Smoking Prevention; D014029:Tobacco Use Disorder / Q000209:etiology* / Q000534:rehabilitation
chemical_list: D002638:Chewing Gum; D009538:Nicotine