title: Canadian studies aimed toward a less harmful cigarette.
mesh_terms: D002170:Canada; D005260:Female; D005609:Free Radicals / Q000032:analysis; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology / Q000401:mortality; D008297:Male; D008670:Metals / Q000032:analysis; D008875:Middle Aged; D009538:Nicotine / Q000032:analysis; D010947:Plants, Toxic; D011247:Pregnancy; D012106:Research; D012906:Smoke / Q000032:analysis; D012907:Smoking / Q000150:complications / Q000453:epidemiology / Q000401:mortality; D013223:Statistics as Topic; D014026:Nicotiana / Q000032:analysis; D014427:Twins
chemical_list: D005609:Free Radicals; D008670:Metals; D012906:Smoke; D009538:Nicotine