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Kaplan–Meier curves for a investigator-assessed PFS; b investigator-assessed duration of response (DR) among responders; and c overall survival (OS) stratified by histologic subtype. Data for PFS, DR, and OS were not collected in the axitinib extension study; therefore, results for the 13 patients who rolled over to the extension study were based on data collected from the original trial. CI confidence interval, NE non-estimable
