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Thiopurine monotherapy is effective in ulcerative colitis but significantly less so in Crohn's disease: long-term outcomes for 11 928 patients in the UK inflammatory bowel disease bioresource.
Stournaras E, Qian W, Pappas A, Hong YY, Shawky R; UK IBD BioResource Investigators; Raine T, Parkes M; UK IBD Bioresource Investigators. Stournaras E, et al. Gut. 2021 Apr;70(4):677-686. doi: 10.1136/gutjnl-2019-320185. Epub 2020 Oct 1. Gut. 2021. PMID: 33004550 Free PMC article.