Model Systems for Infection and Immunity;
Helmholtz Centre for Infection Research;
Inhoffenstr. 7;
38124 Braunschweig;
Germany;
Clinic for Internal Medicine I;
University Hospital UIm;
Albert-Einstein-Allee 23;
89081 UIm;
Germany;
Experimental Hematology;
Medical School Hannover;
Carl-Neuberg-Str. 1;
D-30625 Hannover;
Germany;
Current address;
Institute for Immunology;
Justus-Liebig University Giessen;
BFS;
Schubertstr. 81;
35390 Giessen;
Germany;