1. Laboratory of Molecular Virology, Azienda Ospedaliero-Universitaria Maggiore della Carità, Novara, Italy
2. Infection Biology Research Programme, Department of Virology, Haartman Institute, Faculty of Medicine, University of Helsinki, Helsinki, Finland
3. Department of Diagnostics, Laboratory Service and Forensic Medicine, Section of Pathological Anatomy, University of Modena and Reggio Emilia, Italy
4. Department of Pathological Anatomy, Faculty of Medicine and Surgery, University Amedeo Avogadro del Piemonte Orientale, Novara, Italy
5. Department of Translational Medicine, University of Eastern Piedmont ‘Amedeo Avogadro’, Novara, Italy