Maintenance Bevacizumab or Observation After Taxane Based First Line Chemotherapy In Metastatic Breast Cancer

University Hospital of Crete, Dep of Medical Oncology, Heraklion

University General Hospital of Alexandroupolis, Dept. of Medical Oncology, Alexandroupoli

"IASO General Hospital of Athens", Athens

Air Forces Military Hospital of Athens, Athens

"Metaxa's Anticancer Hospital of Piraeus, 1st Dep of Medical Oncology", Piraeus

"Theagenion Anticancer Hospital of Thessaloniki, 2nd Dep of Medical Oncology", Thessaloniki