title: Acrolein Levels in e-Cigarettes-Letter.
mesh_terms: D000171:Acrolein / Q000008:administration & dosage*; D002248:Carbon Monoxide / Q000008:administration & dosage*; D066300:Electronic Nicotine Delivery Systems; D005260:Female; D006801:Humans; D008297:Male; D009538:Nicotine / Q000008:administration & dosage*; D012907:Smoking / Q000009:adverse effects*
chemical_list: D009538:Nicotine; D000171:Acrolein; D002248:Carbon Monoxide