1. SR Lord, PhD, is Associate Professor, Prince of Wales Medical Research Institute, University of New South Wales, Barker Street, Randwick, New South Wales, 2031, Australia.
2. HB Menz, PhD, is Research Fellow, Prince of Wales Medical Research Institute, University of New South Wales
3. A Tiedemann, BSc (Hum Movt), Grad Dip Exerc Sc, is Research Officer, Prince of Wales Medical Research Institute, University of New South Wales