title: Letter: Low carbon-monoxide cigarettes.
mesh_terms: D002248:Carbon Monoxide / Q000032:analysis* / Q000097:blood; D002263:Carboxyhemoglobin / Q000032:analysis*; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D009538:Nicotine / Q000032:analysis*; D012907:Smoking; D013638:Tars / Q000032:analysis
chemical_list: D006454:Hemoglobins; D013638:Tars; D009538:Nicotine; D002248:Carbon Monoxide; D002263:Carboxyhemoglobin