1. Institute of Farm Animal Genetics; Friedrich-Loeffler-Institut; Mariensee Neustadt Germany
2. Transplant Laboratory; Clinic for General, Visceral, and Transplant Surgery, Hannover Medical School; Hannover Germany
3. Robert Koch Institute; Berlin Germany
4. Department of Hematology; Hemostasis, Oncology and Stem Cell Transplantation, Medical School Hanover; Hannover Germany
5. Department of Clinical Research; University of Bern; Bern Switzerland