[1] Curtin Univ, Curtin enAble Inst, Perth, WA, Australia
[2] Curtin Univ, Curtin Sch Allied Hlth, Perth, WA, Australia
[3] Royal United Hosp Bath NHS Fdn Trust, Bath, England
[4] Univ West England, Bristol, England
[5] Claremont Pain Clin, Perth, WA, Australia
[6] Pain Opt, South Perth, WA, Australia
[7] Curtin Univ, Sch Allied Hlth, GPO Box U1987, Perth, WA 6845, Australia