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Colectomy rate according to cytomegalovirus antigen status. The cumulative colectomy rate according to cytomegalovirus (CMV) antigen status. Twelve (30%) of the CMV-positive patients and 24 (30.8%) of the CMV-negative patients underwent colectomy during the observation period and no difference in colectomy rate was observed between the two groups (P = 0.81, Log-rank test, median observation period: 31 mo).
