Epithelial-to-mesenchymal Transition Heterogeneity of Circulating Tumor Cells and Their Correlation With MDSCs and Tregs in HER2-negative Metastatic Breast Cancer Patients

¹Laboratory of Translational Oncology, School of Medicine, University of Crete, Heraklion, Greece;
²Department of Medical Oncology, Medical School, Democritus University of Thrace, Alexandroupolis, Greece;
³Hellenic Oncology Research Group (HORG), Athens, Greece;
⁴Department of Biology, University of Patras, Patras, Greece;
⁵Department of Medical Oncology, University Hospital of Larissa & Laboratory of Oncology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece;
⁶School of Medicine, University of Crete, Heraklion, Greece

Correspondence to: Vassilis Georgoulias, MD, Ph.D., Hellenic Oncology Research Group (HORG), Gregoriou Theologou 5, 11471, Athens, Greece. Tel: +30 2106448450, Fax: +30 2106448450, e-mail: georgulv{at}otenet.gr