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Blackwell J, Saxena S, Jayasooriya N, Petersen I, Hotopf M, Creese H, Bottle A, Pollok RCG; POP-IBD Study Group.Blackwell J, et al. Among authors: petersen i.Clin Gastroenterol Hepatol. 2022 Apr;20(4):e703-e710. doi: 10.1016/j.cgh.2020.12.026. Epub 2020 Dec 25.Clin Gastroenterol Hepatol. 2022.PMID: 33359727
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