1. Department of Vascular Surgery, University Hospital Dubrava, Zagreb, Croatia
2. Department of Nephrology, Hospital de Mollet, Fundació Sanitària Mollet, Barcelona, Spain
3. 3rd Department of Internal Medicine, First Faculty of Medicine, Charles University, Prague, Czech Republic
4. Department of Nephrology, University Medical Centre Ljubljana, Ljubljana, Slovenia
5. Department of Clinical Science, Division of Nephrology and Dialysis, University La Sapienza, Rome, Italy
6. Department and Clinic of Nephrology and Transplantation Medicine, Wroclaw Medical University, Wroclaw, Poland
7. Nephrology and Dialysis Unit, S. Paolo Hospital, Milan, Italy
8. Department of Medicine, Surgery and Dentistry, University of Milan, Milan, Italy
9. Department of Nephrology, Clinical Hospital Centre Zemun, Belgrade, Serbia