1. Department of Cardiology, Patras University Hospital, 26504 Patras, Greece
2. Department of Internal Medicine and Division of Infectious Diseases, University of Patras Medical School, 26504 Patras, Greece
3. Department of Pathology, Medical School of Patras, 26504 Patras, Greece
4. Laboratory of Immunohematology, Division of Hematology, Department of Internal Medicine, Medical School, University of Patras, 26504 Patras, Greece
5. Cytology Department, Aretaieion University Hospital, National Kapodistrian University of Athens, 11528 Athens, Greece
6. Department of Nephrology and Transplantation, Patras University Hospital, 26504 Patras, Greece
7. Department of Medicine, University of Patras, 26504 Patras, Greece
8. Division of Gastroenterology, Department of Internal Medicine, Medical School, University of Patras, University Hospital of Patras, 26504 Patras, Greece