1. Department of Medicine, Neurological Unit, “Garibaldi” Hospital, Catania, Italy (D.A.R.)
2. Department of Systems Medicine, Tor Vergata University, Rome, Italy, Unit of Neurology, IRCCS Neuromed Pozzilli, Italy (D.C.)
3. University of Catania, Catania, Italy (A.A.)
4. ENT Unit, University of Padua, Padova, Italy (R.M.)