1. Department of Epidemiology and Biostatistics, National Institute for Health Development, Tallinn, Estonia;
2. Department of Urology and Kidney Transplantation, Clinic of Surgery, Tartu University Hospital, Tartu, Estonia;
3. Institute of Family Medicine and Public Health, University of Tartu, Tartu, Estonia;
4. Clinic of Haematology and Oncology, Tartu University Hospital, Tartu, Estonia;
5. Institute of Clinical Medicine, University of Tartu, Tartu, Estonia