1 Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institute, and Scandinavian Center for Orofacial Neurosciences (SCON), Huddinge, Sweden.
2 Department of Prosthodontics, University of Würzburg, Würzburg, Germany.
3 Department of Prosthodontics, Dental Faculty, National and Kapodistrian University of Athens, Athens, Greece.