1. Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
2. Research Center Borstel, Division of Innate Immunity, Airway Research Center North (ARCN), German Center for Lung Research (DZL), Borstel, Germany
3. Institute for Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
4. University Hospital Marburg, Institute of Virology, Marburg, Germany