1. Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, the Netherlands;
2. JDRF Center for Beta Cell Therapy in Diabetes Brussels, Belgium;
3. Department of Immunobiology, King's College School of Medicine, Guy's Hospital, London, U.K.;
4. Divison of Immunology, The Netherlands Cancer Institute, Amsterdam, the Netherlands;
5. Diabetes Research Center, Brussels Free University-VUB, Brussels, Belgium.