1. S O'Shea, BPhty(Hons), is Staff Physiotherapist, Wodonga Regional Health Service, Wodonga, Victoria, Australia
2. ME Morris, PhD, MappSc, BappSc(PT), Grad Dip (Gerontology), is Professor and Head, School of Physiotherapy, La Trobe University, Victoria 3086, Australia.
3. R Iansek, PhD, FRACP, is Neurologist and Director, Movement Disorders Program, Kingston Centre, Cheltenham, Victoria, Australia