1 Department of Ear, Nose and Throat Surgery, University Hospitals Birmingham NHS Foundation Trust.
2 UCL Ear Institute, University College London.
3 Department of Clinical Neurosciences, University of Cambridge.
4 Department of Ear, Nose and Throat Surgery, Warwick Hospital, South Warwickshire University Hospitals NHS Foundation Trust.
5 Department of Ear, Nose and Throat Surgery, University Hospitals Birmingham NHS Foundation Trust; Institute of Metabolism and Systems Research, University of Birmingham.