1. Faculty of Medicine, Belgrade + Zvezdara University Medical Center, Clinical Department of Renal Diseases, Belgrade
2. Faculty of Medicine, Novi Sad + Clinical Center of Vojvodina, Clinic for Nephrology and Immunology, Novi Sad
3. Medical Center, Kruševac
4. Medical Center, Pirot
5. General Hospital "Djordje Joanović", Zrenjanin
6. Faculty of Medicine, Institute for Medical Statistic and Informatics, Belgrade