<style face="normal" font="default" size="100%">Beta-blocker usage and breast cancer survival: a nested case-control study within a UK clinical practice research datalink cohort</style>

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31<style face="normal" font="default" size="100%">Beta-blocker usage and breast cancer survival: a nested case-control study within a UK clinical practice research datalink cohort</style><style face="normal" font="default" size="100%">Beta-blocker usage and breast cancer survival: a nested case-control study within a UK clinical practice research datalink cohort</style>