1. Immunohematology Institute of Hematology and Transfusion Medicine Warsaw Poland
2. Department of Medical Genetics Medical University of Warsaw Warsaw Poland
3. Mossakowski Medical Research Center, Department of Experimental and Clinical Neuropathology Polish Academy of Sciences Warsaw Poland
4. Department of Immunohematology Regional Blood Transfusion Centre Poznań Poland
5. International Blood Group Reference Laboratory NHS Blood and Transplant Bristol UK