1. Department of Orofacial Pain and Jaw FunctionVästmanland County Hospital Västerås Sweden
2. Centre for Clinical ResearchUppsala University Västerås Sweden
3. Clinic of Orofacial PainSahlgrenska Academy and Public Dental Health Gothenburg Sweden
4. Department of Orofacial Pain and Jaw FunctionPostgraduate Dental Education Center Örebro Sweden
5. Department of Orofacial Pain and Jaw FunctionFaculty of OdontologyMalmö University Malmö Sweden