SAN ANTONIO (EGMN) - Quantitative measurement of total HER2 expression and function using a novel assay permitted improved stratification of metastatic breast cancer patients for trastuzumab therapy in a study presented at the San Antonio Breast Cancer Symposium.Conventional human epidermal growth factor receptor 2 (HER2) testing via immunohistochemistry or fluorescence in situ hybridisation leaves much to be desired as a means of identifying breast cancer patients who are suitable candidates for...