1. P.J. Van der Wees, PT, PhD, Radboud University Nijmegen Medical Centre, Scientific Institute for Quality of Healthcare, Nijmegen, the Netherlands; Department of Epidemiology, CAPHRI School for Public Health and Primary Care, Maastricht University, PO Box 616, 6200 MD Maastricht, the Netherlands; and Royal Dutch Society for Physical Therapy, the Netherlands.
2. A.P. Moore, PT, PhD, University of Brighton, Eastbourne, United Kingdom.
3. C.M. Powers, PT, PhD, University of Southern California, Los Angeles, California.
4. A. Stewart, PT, PhD, University of the Witwatersrand, Johannesburg, South Africa.
5. M.W.G. Nijhuis-van der Sanden, PT, PhD, Radboud University Nijmegen Medical Centre, Scientific Institute for Quality of Healthcare.
6. R.A. de Bie, PT, PhD, Department of Epidemiology, CAPHRI School for Public Health and Primary Care, Maastricht University.