analysisProgression-free survival (PFS) was defined as the time spanbetween the date of treatment to the earliest sign of diseaseprogression as determined by CT or MRI according to RECISTcriteria,15or death from any cause. Median survival time(MST) was defined as the time from the date of treatmentto the date of death. Safety and tolerability were assessedaccording to National Cancer Institute Common Terminol-ogy Criteria for Adverse Events, version 3.0.PFS and MSTwere analyzed by using the Kaplan—Meier method, and werecompared using the log-rank test. Baseline characteristicswere analyzed using either two-sample t tests or Wilcoxonrank sum tests for continuous data, and Chi-squared testsor Fisher’s exact tests for categorical data were conductedafter the test for normality. A significance level of 5% wasused throughout the analysis. The incidence rates of adverseevents were compared with the use of Fisher’s exact tests.All statistical analysis was done with the SPSS 16.0 statisticalpackage