<style face="normal" font="default" size="100%">What is the harm-benefit ratio of Cox-2 inhibitors?</style>

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31<style face="normal" font="default" size="100%">What is the harm-benefit ratio of Cox-2 inhibitors?</style><style face="normal" font="default" size="100%">What is the harm-benefit ratio of Cox-2 inhibitors?</style>