1. Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria
2. Mass Spectrometry Facility, Max F. Perutz Laboratories, Vienna Biocenter, Vienna, Austria
3. Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria
4. Center for Pathophysiology, Infectiology and Immunology, Institute of Immunology, Medical University of Vienna, Vienna, Austria
5. Department of Pediatrics, Children's Hospital, University of Alabama at Birmingham, Birmingham, AL, USA
6. Department of Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia