Fig. 4From: Individualized prediction of survival benefit from primary tumor resection for patients with unresectable metastatic colorectal cancerCalibration curves of the nomograms for predicting 1-year overall survival a for patients with primary tumor resection (PTR) in training cohort, b for patients without PTR in training cohort, c for patients with PTR in validation cohort, and d for patients without PTR in validation cohortBack to article page