1. I. Department of Internal Medicine University Medical Center Hamburg‐Eppendorf Hamburg Germany
2. Georgetown University Medical Center Washington DC USA
3. Institut National de la Transfusion Sanguine Paris France
4. German Center for Infection Research (DZIF) Hamburg‐Lübeck‐Borstel‐Riems site Borstel Germany
5. Department of Medical Microbiology, Virology and Hygiene University Medical Center Hamburg‐Eppendorf Hamburg Germany