1. Utrecht University, Faculty of Pharmacy, Department of Pharmacoepidemiology & Pharmacotherapy, P.O. Box 80 082, Utrecht 3508 TB, The Netherlands
2. University Hospital Utrecht, Department of Cardiology, Heart Lung Institute, G02.523, P.O. Box 85 500, Utrecht 3508 GA, The Netherlands
3. National Institute of Public Health and Environmental Protection, P.O. Box 1, Bilthoven 3720 BA, The Netherlands
4. University Hospital Utrecht, Department of Cardiology, Heart Lung Institute, P.O. Box 85 500, Utrecht 3508 GA, The Netherlands
5. pharma Bio-Research, Science Park, P.O. Box 200, Zuidlaren 9470 AE, The Netherlands