1. Institute of Immunology; Christian-Albrechts-University Kiel; Kiel; Germany
2. Institute for Molecular Medicine; Goethe-University Frankfurt am Main, Frankfurt am Main; Germany
3. Institute of Clinical Transfusion Medicine and Immunogenetics; University of Ulm; Ulm; Germany
4. Institute for Experimental Tumor Research, Molecular Oncology Division; Christian-Albrechts-University Kiel; Kiel; Germany