- Correspondence to Dr Frank de Vries, Division of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, Utrecht 3584 CG, The Netherlands;
- Received January 17, 2014
- Revised February 25, 2014
- Accepted March 1, 2014
- First published March 21, 2014.
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