title: A machinery murmur.
authors.forename: C J
authors.initials: CJ
authors.lastname: Johnson
mesh_terms: D019296:Capnography / Q000295:instrumentation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000295:instrumentation*; D009622:Noise