[1] Univ Cent Lancashire, Dept Nursing, Clin Practice Res Unit, Preston PR1 2HE, Lancs, England
[2] Royal Liverpoos & Broadgreen Univ Hosp NHS Trust, Liverpool, Merseyside, England
[3] Royal Grp Hosp & Dent Hosp Hlth & Social Serv Tru, Belfast, Antrim, North Ireland
[4] Wolfson Neurorehabil Ctr, London, England
[5] St George Hosp, London, England