"Yesterday and to-day".
D000758:Anesthesia / Q000266:history*; D000776:Anesthesiology / Q000295:instrumentation; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049691:History, Medieval; D006761:Hospitals / Q000266:history; D008131:London