1. Department of Orofacial Pain and Jaw Function, Faculty of Odontology, Malmö University, Malmö, Sweden
2. Scandinavian Center for Orofacial Neurosciences (SCON), Malmö, Sweden
3. Department of Rehabilitation Medicine, Skåne University Hospital, Lund, Sweden
4. Danish Headache Center, Department of Neurology, Rigshospitalet-Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark