title: A controlled trial of nicotine chewing gum in a smoking withdrawal clinic.
mesh_terms: D002638:Chewing Gum / Q000009:adverse effects; D002986:Clinical Trials as Topic; D006801:Humans; D009538:Nicotine / Q000009:adverse effects / Q000627:therapeutic use*; D011897:Random Allocation; D000074606:Smoking Prevention; D013375:Substance Withdrawal Syndrome / Q000517:prevention & control
chemical_list: D002638:Chewing Gum; D009538:Nicotine