1 Regional Maxillofacial Unit, Aintree University Hospital, Liverpool, UK. Electronic address: johnedoconnell@yahoo.com.
2 Regional Maxillofacial Unit, Aintree University Hospital, Liverpool, UK; Department of Molecular and Clinical Cancer Medicine, Northwest Cancer Research Centre, University of Liverpool, Liverpool, UK.
3 Regional Maxillofacial Unit, Aintree University Hospital, Liverpool, UK.