Fig. 2From: Characterization of spontaneously-developed non-alcoholic fatty liver disease in aged rhesus monkeysCorrelation between USS and histological steatosis. a Spearman’s correlation between the USS and histological results of steatosis. b Receiver operating characteristic (ROC) curve for the USS to diagnose moderate-to-severe steatosis; cut-off point set at 2 (n = 45; USS ultrasonographic steatosis score)Back to article page