1. Department of Transplantation Immunology, Institute of Immunology; University of Heidelberg; Heidelberg; Germany
2. Department of Immunohematology and Blood Transfusion; Leiden; the Netherlands
3. Department of Blood Group Serology; Medical University of Vienna; Vienna; Austria
4. Immunogenetics Institute, AFIP; São Paulo; Brazil
5. Clinic for Transplantation Immunology and Nephrology; University Hospital Basel; Basel; Switzerland
6. HLA Laboratory; Charité Universitätsmedizin; Berlin; Germany
7. Spain Transplant Immunology Laboratory; Clinic de Barcelona; Barcelona; Spain