title: Tobacco-free electronic cigarettes and cigars deliver nicotine and generate concern.
authors: John
authors: J
authors: Pauly
authors: Qiang
authors: Q
authors: Li
authors: Matthew B
authors: MB
authors: Barry
mesh_terms: D016503:Drug Delivery Systems; D004867:Equipment Design; D006801:Humans; D009538:Nicotine / Q000008:administration & dosage*; D016540:Smoking Cessation / Q000379:methods*
chemical_list: D009538:Nicotine