1. Institute of Virology, Ulm University Medical Center, Ulm, Germany
2. Gynecology and Obstetrics Clinics, Ulm University Hospital, Ulm, Germany
3. Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
4. Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
5. Institute for Virology, Hannover Medical School, Hannover, Germany
6. German Centre for Infection Research (DZIF), Location Hannover-Braunschweig, Germany