1 Academic Department of Neuro-Otology, Division of Brain Sciences, Department of Medicine, Charing Cross Hospital Campus, Imperial College London, London, W6 8RF, UK; Escuela de Fonoaudiología, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile.
2 Academic Department of Neuro-Otology, Division of Brain Sciences, Department of Medicine, Charing Cross Hospital Campus, Imperial College London, London, W6 8RF, UK.
3 Academic Department of Neuro-Otology, Division of Brain Sciences, Department of Medicine, Charing Cross Hospital Campus, Imperial College London, London, W6 8RF, UK; Department of Neuroscience, Psychology and Behaviour, University of Leicester, University Road, Leicester, LE1 7RH, UK. Electronic address: q.arshad@imperial.ac.uk.