1. Head and Neck Department SCDU Neurology Maggiore della Carità Hospital Novara Italy
2. Department of Clinical Neurosciences and Preventive Medicine Donau‐Universität Krems Krems Austria
3. Department of Neurology Institute of Neuroscience University Hospital Ghent Belgium
4. Department of Clinical and Experimental Medicine Unit of Clinical Neurology University of Sassari Sassari Italy
5. Neurology Department Inselspital Bern University Hospital Bern Switzerland