Sebastian S, Walker GJ, Kennedy NA, et al. Assessment, endoscopy, and treatment in patients with acute severe ulcerative colitis during the COVID-19 pandemic (PROTECT-ASUC): a multicentre, observational, case-control study. Lancet Gastronenterol Hepatol 2021; 6: 271–81—The appendix of this Article has been corrected as of March 11, 2021.
. 2021 Mar 11;6(4):e3. doi: 10.1016/S2468-1253(21)00068-6
Correction to Lancet Gastroenterol Hepatol 2021; 6: 271–81
Issue date 2021 Apr.
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