Anaesthesia.
D000771:Anesthesia, Intravenous / Q000266:history; D000776:Anesthesiology / Q000266:history*; D003521:Cyclopropanes; D006221:Halothane; D049673:History, 20th Century; D007442:Intubation, Intratracheal / Q000266:history; D006113:United Kingdom
D003521:Cyclopropanes; D006221:Halothane