1. Second Department of Internal Medicine and Infectious Diseases Unit, Tzaneio General Hospital of Piraeus, 18536 Piraeus, Greece
2. Department of Emergency Medicine, Tzaneio General Hospital of Piraeus, 18536 Piraeus, Greece
3. First Department of General Surgery, Tzaneio General Hospital of Piraeus, 18536 Piraeus, Greece
4. First Department of Internal Medicine and Diabetes Center, Tzaneio General Hospital of Piraeus, 18536 Piraeus, Greece
5. Fourth Department of Internal Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
6. Third Department of Internal Medicine, Tzaneio General Hospital of Piraeus, 18536 Piraeus, Greece
7. First Department of Surgery, Laikon General Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece
8. Department of Thoracic Surgery, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece