1. Diagnostic & Research Institute of Hygiene, Microbiology and Environmental Medicine, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, Graz, Austria
2. Diagnostic & Research Institute of Pathology, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, Graz, Austria
3. Institute of Virology, Medical University of Innsbruck, Innsbruck, Austria