1. Rhinology and Skull Base Research Group, St Vincent's Centre for Applied Medical Research, University of New South Wales, Sydney, New South Wales, Australia
2. Faculty of Medicine, University of Sydney, Sydney, New South Wales, Australia
3. Sinus and Nasal Specialists of Louisiana, Baton Rouge, Louisiana
4. Department of Otolaryngology-Head & Neck Surgery - Faculty of Medicine and Health Sciences, Macquarie University, Sydney, New South Wales, Australia