[1] La Trobe Univ, Natl Strole Res Inst, Melbourne, Vic, Australia
[2] La Trobe Univ, Sch Physiotherapy, Melbourne, Vic, Australia
[3] Baker Heart Res Inst, Melbourne, Vic, Australia
[4] Univ Sydney, Western Clin Sch, Dept Geriatr Med, Sydney, NSW 2006, Australia
[5] St Olav Hosp, Dept Neurosci, Trondheim, Norway
[6] St Olav Hosp, Dept Med, Trondheim, Norway
[7] Glasgow Royal Infirm, Dept Geriatr Med, Glasgow G4 0SF, Lanark, Scotland