1 Oral and Maxillofacial Department, St Luke's Hospital Bradford, Little Horton Lane, Bradford, West Yorkshire, England BD5 0NA. Electronic address: jonathan.wareing@nhs.net.
2 Oral and Maxillofacial Department, Castel Hill Hospital, Castle Rd, Cottingham HU16 5JQ.
3 Oral and Maxillofacial Department, St Luke's Hospital Bradford, Little Horton Lane, Bradford, West Yorkshire, England BD5 0NA.