Abstract Background Not all breast cancer (BC) patients who receive neoadjuvant chemotherapy achieve a pathologic complete response (pCR). but the reasons for this are unknown. Previous studies have shown that exosomes produced in the tumor microenvironment in response to chemotherapy promote a chemotherapy-resistant phenotype in tumors. However. https://www.roneverhart.com/Doorking-2108-080-eVolve-Smart-Video-Intercom-System/