[1] St Thomas Hosp, Guys & St Thomas Hosp NHS Fdn Trust, Physiotherapy Dept, Westminster Bridge Rd, London, England
[2] Kings Coll London, Ctr Human & Aerosp Physiol Sci, London, England
[3] Kings Coll London, Inst Psychiat, Pain Sect, Neuroimaging, London, England
[4] Univ South Australia, Sch Hlth Sci, Adelaide, SA, Australia
[5] Univ East Anglia, Fac Med & Hlth Sci, Sch Hlth Sci, Norwich, Norfolk, England