1 Department of Oral and Maxillofacial Surgery, University Hospital Crosshouse, Kilmarnock Rd, Crosshouse, Kilmarnock, KA2 0BE, Scotland. siofra.murphy2@ggc.scot.nhs.uk.
2 Department of Oral and Maxillofacial Surgery, University Hospital Crosshouse, Kilmarnock Rd, Crosshouse, Kilmarnock, KA2 0BE, Scotland.