1. Laboratory of Blood Genetics, Department of Clinical Immunology Copenhagen University Hospital Copenhagen Denmark
2. cfDNA subgroup from the International Society of Blood Transfusion (ISBT) Working Party on Red Cell Immunogenetics and Blood Group Terminology (RCIBGT) Amsterdam The Netherlands
3. Department of Clinical Immunology and Transfusion Medicine Office for Medical Services Region Skåne Sweden
4. Institute for Clinical Immunology and Transfusion Medicine Justus‐Liebig‐University Giessen Germany
5. Institute of Transfusion Medicine and Immunology Heidelberg University, Medical Faculty Mannheim, German Red Cross Blood Service Baden Württemberg – Hessen Mannheim Germany
6. Department of Blood Group Serology and Transfusion Medicine Medical University of Vienna Vienna Austria
7. Blood Transfusion Centre of Slovenia Ljubljana Slovenia
8. National Health Service Blood and Transplant International Blood Group Reference Laboratory UK
9. Institute of Hematology and Transfusion Medicine Warsaw Poland
10. Finnish Red Cross Blood Service Helsinki Finland
11. Interregional Blood Transfusion SRC Berne Switzerland
12. Clinical Services and Research Australian Red Cross Lifeblood Brisbane Australia
13. Department of Immunology and Transfusion Medicine Oslo University Hospital Oslo Norway
14. The Blood Bank Landspitali University Hospital Reykjavik Iceland
15. Clinical Immunology and Transfusion Medicine Karolinska University Hospital and CLINTEC Karolinska Institutet Stockholm Sweden
16. Versiti Blood Research Institute and Diagnostic Laboratories Milwaukee Wisconsin USA
17. Department of Transfusion Medicine NIH Clinical Center, National Institutes of Health Bethesda Maryland USA
18. Institute for Translational Medicine Private University in the Principality of Liechtenstein Triesen Liechtenstein
19. Department of Immunohaematology Diagnostic Services Sanquin Diagnostic Services and Sanquin Research Amsterdam The Netherlands
20. Department of Haematology Leiden University Medical Center Leiden The Netherlands
21. School of Biomedical Sciences Queensland University of Technology Brisbane Queensland Australia
22. Guangzhou Blood Center Institute of Clinical Blood Transfusion Guangzhou China
23. Department of Pathology Brigham and Women's Hospital Boston Massachusetts USA
24. Harvard Medical School Boston Massachusetts USA
25. Immunohematology Laboratory Blood and Tissue Bank Barcelona Spain
26. Department of Laboratory Medicine Lund University Lund Sweden
27. Institut National de la Transfusion Sanguine Centre National de Référence pour les Groupes Sanguins Paris France
28. Department of Experimental Immunohematology Sanquin Research Amsterdam The Netherlands
29. Institute of Clinical Transfusion Medicine and Immunogenetics Ulm German Red Cross Blood Service Baden‐Württemberg‐Hessen, and Institute of Transfusion Medicine, University of Ulm Ulm Germany
30. Department of Transfusion Medicine University Medical Center Göttingen Göttingen Germany