1. Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, Catania
2. Department of Biomedical and Dental Sciences, Morphological and Functional Images, University of Messina, Messina
3. Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialties, University of Campania “Luigi Vanvitelli”, Naples, Italy
4. Department of Prosthodontics, Dr D.Y. Patil Dental College and Hospital, Dr D.Y. Patil Vidyapeeth, Pimpri, Pune, MH, India