1. University of Groningen, Groningen, The Netherlands.
2. Department of Head and Neck Surgery, Royal Prince Alfred Hospital, Sydney, Australia.
3. Department of Head and Neck Surgery, Liverpool Hospital, Sydney, Australia.
4. Department of Sydney Head and Neck Cancer Institute, Royal Prince Alfred Hospital, Sydney, Australia.
5. Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia.
6. Sydney Medical School, University of Sydney, Sydney, Australia.