1. Department of Cardiology, Thoraxcenter; University Medical Center Groningen; PO Box 30 001 9700 RB Groningen The Netherlands
2. Department of Cardiology; University of Oslo; Rikshospitalet Oslo Norway
3. Centre Hospitalier Hutois; Huy Belgium
4. Amphia Hospital Breda and Department of Clinical Pharmacology; University of Groningen; The Netherlands
5. Kuopio University Hospital; Kuopio Finland
6. Clinical Science; AstraZeneca Mölndal Sweden
7. Nordic School of Public Health; Göteborg Sweden
8. Wallenberg Laboratory for Cardiovascular Research, Sahlgrenska University Hospital; Göteborg Sweden