1. Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA) University of Amsterdam and Vrije Universiteit Amsterdam Amsterdam The Netherlands
2. School of Dentistry University of Padova Padova Italy
3. Department of Oral and Maxillofacial Diseases, Faculty of Medicine University of Helsinki Helsinki Finland
4. Departement of Clinical Dentistry‐Prosthodontics, Faculty of Medicine University of Bergen Bergen Norway