First Department of Propaedeutic Internal Medicine, Medical School, Laiko General Hospital, National Kapodistrian University of Athens, 17 Agiou Thoma Street, 11527, Athens, Greece. ckoliaki@yahoo.com. First Department of Propaedeutic Internal Medicine, Medical School, Laiko General Hospital, National Kapodistrian University of Athens, 17 Agiou Thoma Street, 11527, Athens, Greece. Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens, Greece.