Stephanie M C Ament*, Freek Gillissen*, José M C Maessen, Carmen D Dirksen, Trudy van der Weijden and Maarten F von Meyenfeldt
* Corresponding authors: Stephanie M C Ament stephanie.ament@maastrichtuniversity.nl - Freek Gillissen f.gillissen@maastrichtuniversity.nl
BMC Health Services Research 2012, 12:423 doi:10.1186/1472-6963-12-423
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