1 Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen and University of Groningen, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands. t.h.oude.munnink@umcg.nl.
2 Department of Hematology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
3 Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen and University of Groningen, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands.