1 Department of Clinical Pharmacy and Pharmacology, and Department of Internal Medicine, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands. Electronic address: h.r.bouma@umcg.nl.
2 Department of Anesthesiology, University Medical Center Groningen, Groningen, The Netherlands.
3 Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, Groningen, The Netherlands.