Panagiota Economopoulou1, George Pentheroudakis2. 1. Department of Internal Medicine, Section of Medical Oncology, Attikon University Hospital, National Kapodistrian University of Athens, School of Medicine, Athens, Greece. 2. Department of Medical Oncology, School of Medicine, University of Ioannina, 45110 Ioannina, Greece. Electronic address: gpenther@otenet.gr.