Drupal-Bibcite31<style face="normal" font="default" size="100%">Impact of early thiopurines on surgery in 2770 children and young people diagnosed with inflammatory bowel disease: a national population-based study</style><style face="normal" font="default" size="100%">Impact of early thiopurines on surgery in 2770 children and young people diagnosed with inflammatory bowel disease: a national population-based study</style>