1. Department of Nephrology, Saint Andrews General Hospital of Patras, 26222 Patras, Greece
2. Division of Hematology, Department of Internal Medicine, Medical School, University of Patras, 26504 Patras, Greece
3. Hemodialysis Unit Kyanous Stavros Patras, 26331 Patras, Greece
4. Department of Nephrology, Faculty of Medicine, School of Health Sciences, University of Thessaly, 41223 Larisa, Greece
5. Department of Nuclear Medicine, Saint Andrews General Hospital of Patras, 26222 Patras, Greece
6. Department of Internal Medicine, Medical School, University of Patras, 26504 Patras, Greece
7. Department of Cardiology, Saint Andrews General Hospital of Patras, 26222 Patras, Greece
8. Division of Infectious Diseases, Department of Internal Medicine, Medical School, University of Patras, 26504 Patras, Greece