[1] Univ Melbourne, Natl Stroke Res Inst, Fac Med Dent & Hlth Sci, Melbourne, Vic, Australia
[2] Gosford Hosp, Dept Neurol, Cent Coast Area Hlth, Gosford, Australia
[3] Univ Newcastle, Dept Med, Newcastle, NSW 2308, Australia
[4] Austin Hlth, Dept Neurol, Heidelberg West, Australia
[5] Univ Melbourne, Dept Med, Melbourne, Vic, Australia
[6] Menzies Res Inst, Hobart, Tas, Australia
[7] Alfred Hosp, Dept Epidemiol & Prevent Med, Monash Med Sch, Melbourne, Vic, Australia