Advertisements in the Laryngoscope. Clinical confirmation.
D000329:Advertising / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D010947:Plants, Toxic; D012106:Research / Q000266:history; D012907:Smoking / Q000009:adverse effects / Q000266:history*; D014026:Nicotiana / Q000737:chemistry