Biomarker analysis
MICROSATELLITE INSTABILITY
The biomarker analysis conducted in this study, including the examination of gene mutations, gene amplification, and microsatellite instability, was predefined in our study protocol. A total of 31 patients were included in the biomarker analysis (Table The associations between biomarkers and progression-free survivalIn 31 patients eligible for biomarker analysis, 28 were evaluable. 