1. Helmholtz Center for Infection Research (HZI), 38124 Braunschweig, Germany.
2. Instituto de Tecnologia Química e Biológica-Universidade Nova de Lisboa/Instituto de Biologia Experimental e Tecnológica (ITQB-UNL/IBET), P-2781-901 Oeiras, Portugal.
3. EUFETS, D-55743 Idar-Oberstein, Germany.
4. National Center for Tumor Diseases (NCT), German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany.
5. Experimental Hematology, Hannover Medical School (MHH), D-30625 Hannover, Germany.