1. Department of Medicine and Surgery, University of Insubria, Varese, Italy.
2. Private Practitioner, Milan, Italy.
3. Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Malmö, Sweden.
4. Department of Neurosciences, Section of Dentistry, University of Padova, Padova, Italy.
5. Private Practitioner, Varese, Italy.
6. Department of Medicine and Surgery, Unit of Oral Pathology, University of Insubria, Varese, Italy.
7. IRCCS Fondazione Cà Granda, University of Milan, Milan, Italy.