1. Fresenius Medical Care-Dialysis Services Slovakia, Kosice, Slovakia
2. Graduate School Kosice Institute for Society and Health, Faculty of Medicine, Safarik University, Kosice, Slovakia
3. Department of Health Psychology, Faculty of Medicine, Safarik University, Kosice, Slovakia
4. Transplantation Department, Faculty of Medicine and University Hospital, Safarik University, Kosice, Slovakia
5. St. Lukas Geriatric Centre, Kosice, Slovakia
6. Department of Community & Occupational Health, University Medical Centre Groningen, University of Groningen, Groningen, Netherlands