[1] Univ Birmingham, Dept Oral Surg, Birmingham, W Midlands, England
[2] Birmingham Community Healthcare NHS Fdn Trust, Dept Oral Surg, Birmingham Dent Hosp, Birmingham, W Midlands, England
[3] Univ Klinikum Dusseldorf, Dept Orthodont, Dusseldorf, Germany
[4] Univ Padua, Dent Sect, Dept Neurosci, Padua, Italy
[5] Univ Klinikum Dusseldorf, Dept Oral Surg, Dusseldorf, Germany
[6] Malmo Univ, Fac Odontol, Malmo, Sweden
[7] Karolinska Inst, Dept Dent Med, Stockholm, Sweden