<style face="normal" font="default" size="100%">Changes in the presenting symptoms of lung cancer from 2000-2017: a serial cross-sectional study of observational records in UK primary care</style>

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31<style face="normal" font="default" size="100%">Changes in the presenting symptoms of lung cancer from 2000-2017: a serial cross-sectional study of observational records in UK primary care</style><style face="normal" font="default" size="100%">Changes in the presenting symptoms of lung cancer from 2000-2017: a serial cross-sectional study of observational records in UK primary care</style>