Retrospective evaluation of anesthesia care.
D000758:Anesthesia / Q000266:history; D000770:Anesthesia, Endotracheal; D004739:England; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014481:United States