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Meta-analysis according to other stratification factors
aStatistically significant.
Abbreviations: EGFR, epidermal growth factor receptor; HER-2, human epidermal growth factor receptor 2; mAb, monoclonal antibody; mTOR, mammalian target of rapamycin; TKI, tyrosine kinase inhibitor; VEGF(R), vascular endothelial growth factor (receptor).
