1. Department of Physiology, University of Pavia, Pavia, Italy.
2. Laboratory of Clinical Epidemiology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
3. Department of Experimental and Applied Pharmacology, University of Pavia, Pavia, Italy.
4. Institute of Otolaryngology-Head and Neck Surgery, Second University of Naples, Naples, Italy.
5. Department of Health Sciences, University of Molise, Campobasso, Italy.