1. Department of Medicine University of Washington Medical Center & Fred Hutchinson Cancer Center Seattle Washington USA
2. Hoxworth Blood Center University of Cincinnati Cincinnati Ohio USA
3. Department of Pathology and Laboratory Medicine Perelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania USA
4. Department of Laboratory Medicine University of California San Francisco School of Medicine San Francisco California USA
5. Apheresis Research Institute Cologne Germany
6. First Department of Internal Medicine University of Mainz Mainz Germany
7. Division of Hematology, Department of Medicine Duke University Medical Center Durham North Carolina USA
8. Division of Medical Oncology and Hematology University of Toronto Toronto Ontario Canada
9. Seattle Apheresis Collection Center National Marrow Donor Program Seattle Washington USA
10. Division of Nephrology and Hypertension, Department of Medicine University of California San Diego San Diego California USA
11. Department of Pediatric Hematology/Oncology/Neuro‐oncology/Stem Cell Transplant Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Chicago Illinois USA
12. Department for Pediatrics St. Anna Kinderspital, Medical University of Vienna Vienna Austria
13. Department of Laboratory Medicine and Pathology University of Minnesota Minneapolis Minnesota USA
14. Department of Pathology and Laboratory Medicine Dartmouth‐Hitchcock Medical Center Lebanon New Hampshire USA