1. Unit of Pharmacotherapy, Epidemiology and Economics, Department of Pharmacy University of Groningen Groningen The Netherlands
2. Department of Clinical Pharmacy and Pharmacology Medical Center Leeuwarden Leeuwarden The Netherlands
3. Department of Pathology Pathology Friesland Leeuwarden The Netherlands
4. Science Bureau Department Science Bureau, Medical Center Leeuwarden Leeuwarden The Netherlands
5. Department of Epidemiology University of Groningen, University Medical Center Groningen Groningen The Netherlands
6. Location Medical Center Leeuwarden Certe Medical Diagnostics & Advice Leeuwarden The Netherlands
7. Department of Internal Medicine Medical Center Leeuwarden Leeuwarden The Netherlands