From the *EMGO Institute, VU University Medical Centre; †Institute for Health Sciences, VU University, Amsterdam, The Netherlands; ‡Department of Medicine, University of Washington, Seattle, WA; §Department of Clinical Epidemiology and Biostatistics, School of Rehabilitation Science, McMaster University, Hamilton, Ontario, Canada; ¶UnumProvident Centre for Psychosocial and Disability Research, Cardiff University, Cardiff, UK; ∥Primary Care Musculoskeletal Research Centre, Keele University, UK; **Centre for Health Studies, Group Health Cooperative, Seattle, WA; and ††Executive Board of VU University, Amsterdam, The Netherlands.
Acknowledgment date: April 4, 2007. Revision date: April 26, 2007. Acceptance date: May 10, 2007.
The manuscript submitted does not contain information about medical device(s)/drug(s).
No funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.
Address correspondence and reprint requests to Raymond W.J.G. Ostelo, PhD, EMGO Institute, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands; E-mail: [email protected], www.emgo.nl
