1. Department of Neuroscience, Biomedicine and Movement, University of Verona, Verona, Italy;
2. Division of Neurology, Franz Tappeiner Hospital, Merano, Italy;
3. Laboratorio Aziendale di Microbiologia e Virologia, Comprensorio Sanitario di Bolzano, Bolzano, Italy;
4. Department of Neurology, Christian Doppler Medical Centre, Paracelsus Medical University, Salzburg, Austria