First Department of Surgery,Tzaneio General Hospital of Piraeus, 18536 Piraeus, Greece
Second Department of Surgery and Endoscopic Unit, National and Kapodistrian University of Athens Medical School, Aretaieion Hospital, 11527 Athens, Greece
Department of Cytology, Tzaneio General Hospital of Piraeus, 18536 Piraeus, Greece
First Department of Surgery, National and Kapodistrian University of Athens Medical School,Laiko General Hospital, 11527 Athens, Greece
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