[1] Prince Wales Hosp, Inst Neurol Sci, Randwick, NSW, Australia
[2] Liverpool Hosp, Dept Intervent Neuroradiol, Liverpool, NSW, Australia
[3] Ingham Inst Appl Med Res, Liverpool, NSW, Australia
[4] Univ New South Wales, Prince Wales Clin Sch, Randwick, NSW, Australia
[5] Florey Inst Neurosci, Parkville, Vic, Australia
[6] Liverpool Hosp, Dept Radiol, Liverpool, NSW, Australia
[7] Liverpool Hosp, Dept Neurol & Neurophysiol, Liverpool, NSW, Australia
[8] Univ New South Wales, South Western Sydney Clin Sch, Liverpool, NSW, Australia