<style face="normal" font="default" size="100%">Evaluating drug toxicity signals: is a hierarchical classification of evidence useful or a hindrance?</style>

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31<style face="normal" font="default" size="100%">Evaluating drug toxicity signals: is a hierarchical classification of evidence useful or a hindrance?</style><style face="normal" font="default" size="100%">Evaluating drug toxicity signals: is a hierarchical classification of evidence useful or a hindrance?</style>