1. Department of General and Transplantation Surgery, Medical University of Warsaw, 02-006 Warsaw, Poland
2. Department of Health Psychology, Children’s Memorial Health Institute, 00-999 Warsaw, Poland
3. CBOS Public Opinion Research Center, 00-503 Warsaw, Poland
4. Specialist Hospital in Jaslo, 38-200 Jaslo, Poland
5. Polish Transplant Coordinating Center “Poltransplant”, 02-001 Warsaw, Poland
6. Department of Surgical and Transplant Nursing, Medical University of Warsaw, 02-007 Warsaw, Poland
7. Polish Union for Transplantation Medicine, 00-820 Warsaw, Poland