After massive blood loss a dog's intestines are congested, while in humans we see pallor and ischemia.  No wonder conclusions from dog experiments extrapolated to human beings frequently brings about catastrophic results and regrettable failures, which occurred with the earlier models of heart valves and in the first several years of using the heart-lung machine.  For the benefit of medical science vivisection should be stopped.  We must put an end to the medical fraud of vivisection.'

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