1. Department of Biomedical Technologies, School of Dentistry University of Siena Siena Italy
2. Department of Oral and Maxillofacial, Diseases University of Helsinki Helsinki Finland
3. Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA) University of Amsterdam and Vrije Universiteit Amsterdam Amsterdam The Netherlands
4. School of Dentistry University of Padova Padova Italy
5. Newcastle University's School of Dental Sciences Newcastle UK
6. Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine Tel Aviv University Tel Aviv Israel
7. Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine University of Berne Berne Switzerland
8. Clinic of Masticatory Disorders, Center of Dental Medicine University of Zurich Zurich Switzerland
9. Department of Odontology/Clinical Oral Physiology, Faculty of Medicine University of Umeå Umeå Sweden
10. Department of Orofacial Pain and Jaw function, Faculty of Odontology Malmö University Malmö Sweden
11. Department for Prosthodontics, Charité—University Medicine of Berlin, Charité Centre for Dentistry Gerodontology and Craniomandibular Disorders Berlin Germany
12. Section for Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health Aarhus University Aarhus Denmark