282Background: HER2-positive (+) metastatic breast cancer (mBC) has a poor prognosis and many patients require multiple lines of HER2 targeted regimens. This study aims to examine the treatment seq... Click to show full abstract
282Background: HER2-positive (+) metastatic breast cancer (mBC) has a poor prognosis and many patients require multiple lines of HER2 targeted regimens. This study aims to examine the treatment seq...
               
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