1. Institute of Medical Technology, University of Tampere and Tampere University Hospital Biokatu 8 Tampere 33014 Finland
2. Geneart GmbH Josef‐Engert‐Strasse 9 Regensburg 93053 Germany
3. Institute of Medical Microbiology & Hygiene, University of Regensburg Franz‐Josef‐Strauß, Allee 11 Regensburg 93053 Germany
4. Department of Virology, Haartman Institute, University of Helsinki POB21, Haartmaninkatu 3 Helsinki 00014 Finland
5. Department of Virology, Helsinki University Central Hospital 00029 Finland