[1] Royal Prince Alfred Hosp, Dept Neurol, Sydney, NSW, Australia
[2] Univ New South Wales, South Western Sydney Clin Sch, Sydney, NSW, Australia
[3] Balmain Hosp, Dept Rehabil Med, Sydney, NSW, Australia
[4] Balmain Hosp, Speech Pathol Dept, Sydney, NSW, Australia
[5] Royal Prince Alfred Hosp, Dept Radiol, Sydney, NSW, Australia
[6] Concord Repatriat Gen Hosp, Dept Neurol, Sydney, NSW, Australia
[7] Royal Prince Alfred Hosp, PET & Nucl Med, Dept Mol Imaging, Sydney, NSW, Australia
[8] Univ Sydney, Sydney Med Sch, Sydney, NSW, Australia