1. Zentrales Knochenmarkspender-Register Deutschland (ZKRD); Ulm; Germany
2. National Marrow Donor Program (NMDP); Minneapolis; MN; USA
3. France Greffe de Moelle (FGM); Paris; France
4. Anthony Nolan Research Institute and UCL Cancer Institute, Royal Free Campus; London; UK
5. German Bone Marrow Donor Center (DKMS); Tübingen; Germany
6. Czech Stem Cells Registry (CSCR) and Department of Cybernetics, Czech Technical University; Prague; Czech Republic
7. Bone Marrow Donors Worldwide (BMDW); Leiden; The Netherlands