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Start Over Collections Images from the History of Medicine (IHM) ✖Remove constraint Collections: Images from the History of Medicine (IHM) Subjects Oxygen -- therapeutic use ✖Remove constraint Subjects: Oxygen -- therapeutic use Subjects Respiratory Therapy -- instrumentation ✖Remove constraint Subjects: Respiratory Therapy -- instrumentation Genre Photographs ✖Remove constraint Genre: Photographs Genre Advertisements ✖Remove constraint Genre: Advertisements Copyright Public domain ✖Remove constraint Copyright: Public domain Dates by Range 1900-1949 ✖Remove constraint Dates by Range: 1900-1949

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