Would you recognize the Ritchie whistle?
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D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D000776:Anesthesiology / Q000193:education; D004503:Education, Medical, Graduate / Q000379:methods; D004868:Equipment Failure; D006801:Humans; D010102:Oxygen Inhalation Therapy / Q000295:instrumentation*; D017751:Safety Management