Abstract:Background The purpose of this study was to analyze the efficacy and safety of additional anti-HER2 (human epidermal growth factor receptor 2)-targeting drugs in HER2-positive advanced breast cancers.Methods For this study, the following databases were searched for articles published from its inception until December 2019: PubMed, Web of Science, EBSCO, and Cochrane library, of which the main outcomes were the progression-free survival (PFS) and overall survival (OS).Results We conducted a meta-analysis and th… Show more
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