1 NSW Health Pathology, Department of Anatomical Pathology, Royal North Shore Hospital, Sydney, NSW, Australia.
2 Department of Otolaryngology, Head and Neck Surgery, Royal North Shore Hospital, Sydney, NSW, Australia; University of Newcastle, Callaghan, NSW, Australia.
3 Department of Otolaryngology, Head and Neck Surgery, Royal North Shore Hospital, Sydney, NSW, Australia.
4 Department of Anatomical Pathology, Electron Microscopy Unit, Concord Repatriation General Hospital, Sydney, NSW, Australia.
6 NSW Health Pathology, Department of Anatomical Pathology, Royal North Shore Hospital, Sydney, NSW, Australia. Electronic address: christopher.toon@health.nsw.gov.au.