[1] Brighton & Sussex Med Sch, Brighton, England
[2] MOH Holdings, Singapore, Singapore
[3] Salford Royal NHS Fdn Trust, Manchester Acad Hlth Sci Ctr, Dept Neurosurg, Manchester, England
[4] Salford Royal NHS Fdn Trust, Manchester Acad Hlth Sci Ctr, Dept Otolaryngol, Manchester, England
[5] Manchester Acad Hlth Sci Ctr, Geoffrey Jefferson Brain Res Ctr, Manchester, England
[6] Univ Manchester, Fac Brain & Mental Hlth, Sch Med Sci, Div Cardiovasc Sci, Manchester, England
[7] Univ Manchester, Fac Brain & Mental Hlth, Sch Biol Sci, Div Neurosci & Expt Psychol, Manchester, England
[8] Addenbrookes Hosp, Dept Otolaryngol, Cambridge, England
[9] Univ Manchester, Sch Med Sci, Div Canc Sci, Manchester, England