1. Institute of Virology Münster, Westfälische Wilhelms-University, Münster, Germany
2. Department of Genetic Epidemiology, Institute of Human Genetics, Westfälische Wilhelms-University, Münster, Germany
3. Institute of Hygiene Münster, Westfälische Wilhelms-University, Münster, Germany
4. Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Greifswald, Germany