<style face="normal" font="default" size="100%">Is omission of free text records a possible source of data loss and bias in Clinical Practice Research Datalink studies? A case-control study</style>

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31<style face="normal" font="default" size="100%">Is omission of free text records a possible source of data loss and bias in Clinical Practice Research Datalink studies? A case-control study</style><style face="normal" font="default" size="100%">Is omission of free text records a possible source of data loss and bias in Clinical Practice Research Datalink studies? A case-control study</style>