1. Private Practice, Catania, Italy
2. Department of Public Health Dentistry, Dr. D.Y. Patil Dental College and Hospital, Dr. D.Y. Patil Vidyapeeth, Pune, Maharashtra, India
3. Department of Biomedical and Dental Sciences, Morphological and Functional Images, University of Messina, Messina, Italy
4. Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialties, University of Campania “Luigi Vanvitelli”, Naples, Italy