1 Department of Oral and Maxillofacial Surgery, University Hospitals Birmingham, Mindelsohn Way, Birmingham B15 2TH, United Kingdom. Electronic address: asad.ahmed@nhs.net.
2 Department of Oral and Maxillofacial Surgery, University Hospitals Birmingham, Mindelsohn Way, Birmingham B15 2TH, United Kingdom. Electronic address: david.mcgoldrick@nhs.net.