[1] Kings Coll London, Dept Palliat Care Policy & Rehabil, Sch Med, Weston Educ Ctr, London SE5 9RJ, England
[2] Northwick Pk & St Marks Hosp Trust, Reg Rehabil Unit, Harrow, Middx, England
[3] Kings Coll London, Hlth Serv & Populat Res Dept, Inst Psychiat, London SE5 9RJ, England
[4] AUT Univ, Natl Res Ctr Stroke Appl Neurosci & Neurorehabil, Auckland, New Zealand
[5] AUT Univ, Hlth & Rehabil Res Ctr, Auckland, New Zealand