- Correspondence to: Professor B Dierckx de Casterlé Centre for Health Services and Nursing Research, Faculty of Medicine, Catholic University of Leuven, Kapucijnenvoer 35/4, 3000 Leuven, Belgium;
- Received January 27, 2005
- Accepted July 13, 2005
- Revised July 12, 2005
- First published March 30, 2006.
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