1 Department of Surgery-Otolaryngology, Head and Neck Surgery, University of Adelaide, Adelaide, Australia.
2 Rheumatology Department, the Queen Elizabeth Hospital, Woodville, South Australia, Australia; Discipline of Medicine, University of Adelaide, Adelaide, Australia.
3 Department of Molecular and Cell Biology, University of Adelaide, Adelaide, Australia.
4 Department of Surgery-Otolaryngology, Head and Neck Surgery, University of Adelaide, Adelaide, Australia. Electronic address: sarah.vreugde@adelaide.edu.au.