'Leukemia has been dramatically increasing, especially among children, ever since the various modern 'therapies' have been inflicted upon a frightened, artfully misinformed public. Urethane has sometimes an inhibitory effect on human leukemia in contrast to what animal experiments had shown.'
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The characteristic effects in leukaemia were detected solely as a result of clinical observation. The various leukaemias in the mouse and rat were relatively refractory to the influence of urethane, and the remarkable effect in the human might have eluded discovery if attention had been directed to the animal alone. That illustrates the hazards of such work.
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'The argument from man is so much more convincing than the argument from mice - which indeed, may be completely misleading, as in the case of urethane, which has some inhibitory action on human tumours, but a marked, though temporary one on chronic human leukemias.'
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