1. Clinic for Hematology, Lymphoma Center, Clinical Centre Serbia; Belgrade
2. Medical Faculty; Department for internal medicine, University of Belgrade; Belgrade
3. Department for Medical Statistics and Informatics; Medical Faculty, University of Belgrade; Belgrade
4. Division of Nephrology and Hypertension; Department of Internal Medicine, Mayo Clinic; Rochester Minnesota
5. Clinic for Hematology, Clinical Centre Kragujevac; Kragujevac
6. Medical Faculty; Department for internal medicine, University of Kragujevac; Kragujevac
7. Division of Hematology; Department of Internal Medicine, Mayo Clinic; Rochester