1. Cellex Apheresis and Collection Center; MediaPark Klinik Cologne Germany
2. Department of Haematology; Plymouth Hospitals NHS Trust, Derriford Hospital; Plymouth UK
3. Department of Haematology Virology; Plymouth Hospitals NHS Trust, Derriford Hospital; Plymouth UK
4. Department of Haematology; Royal Cornwall Hospitals NHS Trust; Truro UK
5. MVZ Labor Dr. Quade & Kollegen; Cologne; Germany
6. Institute of Virology, University Hospital, University of Duisburg-Essen; Essen Germany
7. Institute of Medical Virology, Justus Liebig University Giessen, National Reference Center for Hepatitis B and D Viruses, Biomedical Research Center Seltersberg; Giessen Germany
8. Anthony Nolan, National Donor Registry of the UK; London UK
9. DKMS, German Bone Marrow Donor Registry; Tübingen Germany