Michael Mather1,2, Kate Musgrave2,3, Nicholas Dawe1. 1. Department of Otolaryngology, Freeman Hospital, Newcastle-upon-Tyne, United Kingdom. 2. Institute of Cellular Medicine, Newcastle University, Newcastle-upon-Tyne, United Kingdom. 3. Department of Haematology, Royal Victoria Infirmary, Newcastle-upon-Tyne, United Kingdom.