Evaluation of PTEN loss and PIK3CA mutations and their correlation with efficacy of trastuzumab treatment in HER2-positive metastatic breast cancer: A retrospective study (KBC-SG 1001)

Evaluation of PTEN loss and PIK3CA mutations and their correlation with efficacy of trastuzumab treatment in HER2-positive metastatic breast cancer: A retrospective study (KBC-SG 1001)