[1] Univ Cologne, Dept Internal Med 1, Lab Immunotherapy, D-50931 Cologne, Germany
[2] Univ Cologne, Dept Expt Med, D-50931 Cologne, Germany
[3] Univ Cologne, Dept Internal Med 1, Lab Lymphocyt Signaling & Oncoproteom, D-50931 Cologne, Germany
[4] Univ Cologne, Inst Med Microbiol Immunol & Hyg, D-50931 Cologne, Germany
[5] Cluster Excellence Cellular Stress Responses Agin, Cologne, Germany
[6] Univ Cologne, Dept Internal Med 1, D-50931 Cologne, Germany