<style face="normal" font="default" size="100%">Validity of cancer diagnosis in a primary care database compared with linked cancer registrations in England. Population-based cohort study</style>

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31<style face="normal" font="default" size="100%">Validity of cancer diagnosis in a primary care database compared with linked cancer registrations in England. Population-based cohort study</style><style face="normal" font="default" size="100%">Validity of cancer diagnosis in a primary care database compared with linked cancer registrations in England. Population-based cohort study</style>