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Receiver operating curve of mucosal quantitative cytomegalovirus polymerase chain reaction for prediction of steroid failure in acute severe ulcerative colitis (ASUC) with an area under the curve of 74% (95% confidence interval, 61–87). A cutoff of 2,000 copies/mg had a sensitivity of 67% and specificity of 70% for prediction of steroid failure in ASUC.
