1 Department of Otolaryngology, Head and Neck Surgery, Gosford Hospital-Central Coast Local Health District, NSW Health, Gosford, New South Wales, Australia.
2 School of Medicine and Public Health-Faculty of Health and Medicine, The University of Newcastle, Newcastle, New South Wales, Australia.
3 Department of Anatomical Pathology, Gosford Hospital-Central Coast Local Health District, NSW Health, Gosford, New South Wales, Australia.