1. School of Dentistry University of Siena Siena Italy
2. Postgraduate School of Orthodontics University of Ferrara Ferrara Italy
3. Department of Neuroscience School of Dentistry University of Padova Padova Italy
4. Department of Orofacial Pain and Dysfunction Academic Centre for Dentistry Amsterdam (ACTA) University of Amsterdam and Vrije Universiteit Amsterdam Amsterdam The Netherlands