1. Department of Neurosciences, Reproductive Sciences and Oral Science, School of Orthodontics and Temporomandibular Disorders, University of Naples Federico II, Naples, Italy
2. Department of Medicine and Surgery, University of Salerno, Salerno, Italy
3. Department of Neurosciences, Reproductive Sciences and Oral Science, Audiology Unit, University of Naples Federico II, Naples, Italy
4. Department of Public Health, University of Naples Federico II, Naples, Italy
5. Department of Public, Clinical and Preventive Medicine, Medical Statistics Unit, University of Campania Luigi Vanvitelli, Naples, Italy