1. J.M. Hush, PhD, is Senior Lecturer, Discipline of Physiotherapy, Faculty of Health Sciences, The University of Sydney, 75 East St, Lidcombe, New South Wales, 2141 Australia.
2. K. Cameron, BAppSc(Phty)Hons, is a graduate student in the Discipline of Physiotherapy, Faculty of Health Sciences, The University of Sydney.
3. M. Mackey, PhD, is Lecturer, Discipline of Physiotherapy, Faculty of Health Sciences, The University of Sydney.