1. Section of Cardiology, Division of Internal Medicine; Karolinska Institutet Danderyd Hospital; S-182 88 Stockholm Sweden
2. Division of Clinical Chemistry; Karolinska Institutet Danderyd Hospital; Stockholm Sweden
3. Division of Clinical Physiology; Karolinska Institutet Danderyd Hospital; Stockholm Sweden
4. Department of Medicine, Division of Clinical Pharmacology; Karolinska Hospital; Solna Sweden
5. Institute for Surgical Research; University of Oslo, Rikshospitalet; Oslo Norway
6. Department of Cardiology; University of Lund, Malmö University Hospital; Malmö Sweden