1. Department of Clinical Pharmacology and Pharmacy, Amsterdam University Medical Center, Amsterdam, the Netherlands.
2. Department of Clinical Pharmacy, OLVG, Amsterdam, the Netherlands.
3. Department of Clinical Pharmacy, Martini Hospital, Groningen, the Netherlands.
4. Department of Clinical Pharmacy, Albert Schweitzer Hospital, Dordrecht, the Netherlands.
5. Laboratorium der Nederlandse Apotheken (LNA), Royal Dutch Pharmacy Association (KNMP), the Hague, the Netherlands.