title: History of the Ayre's T-piece.
mesh_terms: D000769:Anesthesia, Inhalation / Q000295:instrumentation; D000776:Anesthesiology / Q000266:history / Q000295:instrumentation*; D002648:Child; D049673:History, 20th Century; D006801:Humans; D007223:Infant; D006113:United Kingdom