Early years of laryngology in the Boston area.
D001900:Boston; D049672:History, 19th Century; D049673:History, 20th Century; D006784:Hospitals, Teaching / Q000266:history; D007828:Laryngoscopy / Q000266:history; D010036:Otolaryngology / Q000266:history*; D012577:Schools, Medical / Q000266:history; D012955:Societies, Medical / Q000266:history; D014495:Universities