In another study [131], microfluidics-based multiplex qPCR array of 64 cancer-related genes was performed on RNA isolated from EpCAM+/CD45− cells and matched leukocytes, defined as EpCAM−/CD45+ cells, collected from blood samples of patients with metastatic breast cancer through immunomagnetic EpCAM-dependent enrichment followed by FACS. Here, EPCAM is linked to cancer.