1. Department of Internal Medicine I, University Hospital Bonn, Bonn, Germany
2. German Centre for Infection Research, Partner-site Cologne-Bonn, Bonn, Germany
3. Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
4. Department of Microbiology and Immunology, Doherty Institute for Infection and Immunity, University of Melbourne, Victoria, Australia