1. Department for Clinical Immunology and Rheumatology, Hannover Medical School, Hannover, Germany
2. Research Core Unit for Electron Microscopy, Hannover Medical School, Hannover, Germany
3. Department of Dermatology and Allergology, RWTH Aachen University Hospital, Aachen, Germany
4. German Center for Infection Research (DZIF), Hannover-Braunschweig, Germany