Tricia Cheah1, Jennifer F Ha2. 1. Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia Fiona Stanley Hospital, Murdoch, Western Australia, Australia. 2. Department of Otorhinolaryngology Head and Neck Surgery, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia Department of Paediatric Otorhinolaryngology Head and Neck Surgery, VA Ann Arbor Healthcare System, Ann Arbor, Michigan, USA.