1. Division of Oral Diseases Department of Dental Medicine Karolinska Institutet Huddinge 14104 Sweden
2. Division of Endodontics Department of Restorative Dental Science College of Dentistry King Saud University Riyadh 11545 Saudi Arabia
3. Division of Oral Diagnostics and Rehabilitation Department of Dental Medicine Karolinska Institutet Huddinge 14104 Sweden
4. SCON, Scandinavian Center for Orofacial Neurosciences Sweden
5. Division of Orthodontics Department of Preventive Dentistry College of Dentistry Qassim University Buraidah 51412 Saudi Arabia