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Comparisons of the receiver operating characteristic curves of the scores. MELD: model for end-stage liver disease; MELD-Na: MELD combined with serum sodium concentration; iMELD: integrated MELD; ALBI: albumin-bilirubin score. (a) ROC for 28 days; (b) ROC for 90 days; (c) ROC for 6 months.
