Fig. 4From: Predictors of responders to mononuclear stem cell-based therapeutic angiogenesis for no-option critical limb ischemiaReceiver operating characteristic (ROC) curve to address the sensitivity and specificity of the nomogram, with an area under the curve of 0.851 (a) and bias-corrected calibration curve with 1000 cycles of bootstrap resampling to indicate good agreement between the predicted probability and the observed probability of responders (b). AUC, area under the curveBack to article page