title: Three editorials--three historical allusions.
authors.forename: Raymond C
authors.initials: RC
authors.lastname: Roy
mesh_terms: D000776:Anesthesiology / Q000266:history*; D000777:Anesthetics; D018685:Anesthetics, Inhalation; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009609:Nitrous Oxide; D014978:Xenon
chemical_list: D000777:Anesthetics; D018685:Anesthetics, Inhalation; D014978:Xenon; D009609:Nitrous Oxide