From the *Dutch Institute of Allied Health Care, Amersfoort, The Netherlands; † Institute for Research in Extramural Medicine and the ‡Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands; §Department of Epidemiology, Maastricht University, The Netherlands; the ¶School of Health Professions and Rehabilitation Sciences, University of Southampton, Highfield, Southampton, Hants, United Kingdom; the ∥Centre of Quality of Care Research, University Medical Center, Nijmegen, The Netherlands; and **the Department of Medicine and Pharmacology, Free University of Brussels, Brussels, Belgium.
Acknowledgment date: December 23, 2003. First revision date: June 6, 2004. Second revision date: August 29, 2004. Acceptance date: September 17, 2004.
The manuscript submitted does not contain information about medical device(s)/drug(s).
Federal funds were received to support 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 ad requests for reprints to Henricus J.M. Hendriks, Dutch Institute of Allied Health Care, PO Box 1161, 3800 BD, Amersfoort, the Netherlands; E-mail: [email protected]
