1. ESPN/ERA-EDTA Registry, Department of Medical Informatics; Academic Medical Center; Amsterdam; The Netherlands
2. University Children's Hospital; Heidelberg; Germany
3. Children's Memorial Health Institute; Warsaw; Poland
4. Vilnius University Hospital; Vilnius; Lithuania
5. University Children's Hospital; Belgrade; Serbia
6. Agence de la Biomédecine; Paris; France
7. Royal Hospital for Sick Children; Glasgow; UK
8. University Hospital Centre; Zagreb; Croatia
9. University Hospital; Ghent; Belgium
10. Rigshospitalet, Copenhagen University Hospital; Copenhagen; Denmark
11. Lastehaigla Children's Hospital; Tallinn; Estonia
12. Hacettepe University Children's Hospital; Ankara; Turkey
13. Gaslini Children's Hospital; Genoa; Italy