1. Analysis of Circulating Tumor Cells, Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771 Panepistimiopolis, Ilissia, Athens, Greece
2. First Department of Medical Oncology, Metropolitan General Hospital, 264 Mesogion Avenue, 15562 Cholargos, Athens, Greece
3. Department of Pathology, Onassis Cardiac Surgery Center, 356 Leof. Andrea Siggrou, 176 74 Kallithea, Athens, Greece