1 Fourth Unit of Internal Medicine (Nikolaos Papachrysos, Lavrentios Papalavrentios, Emmanouil Sinakos, Ioannis Kouvelis, Evangelos Akriviadis), Aristotle University, Medical School, Thessaloniki, Greece.
2 Department of Pathology (Prodromos Hytiroglou), Aristotle University, Medical School, Thessaloniki, Greece.