1. Department of Reconstructive Dentistry and Gerodontology University of Bern Bern Switzerland
2. Division of Gerodontology and Removable Prosthodontics University of Geneva Geneva Switzerland
3. Department of Orofacial Pain and Dysfunction Academic Centre for Dentistry Amsterdam (ACTA) University of Amsterdam and Vrije Universiteit Amsterdam Amsterdam The Netherlands
4. Department of Dentistry and Oral Health Section for Orofacial Pain and Jaw Function Aarhus University Aarhus Denmark
5. Scandinavian Center for Orofacial Neurosciences (SCON) Aarhus Denmark
6. Faculty of Odontology Malmø University Sweden