Letter: Intravenous anesthesia.
D000771:Anesthesia, Intravenous / Q000266:history*; D006591:Hexobarbital / Q000266:history*; D049673:History, 20th Century; D009520:New Zealand; D013874:Thiopental / Q000266:history*
D006591:Hexobarbital; D013874:Thiopental