title: The filter cigarette controversy.
mesh_terms: D000818:Animals; D002248:Carbon Monoxide / Q000009:adverse effects; D005374:Filtration; D006801:Humans; D008171:Lung Diseases / Q000209:etiology; D012449:Safety; D012907:Smoking / Q000009:adverse effects*
chemical_list: D002248:Carbon Monoxide