1. Department of Cardiology, Karolinska Institute, Huddinge University Hospital, S-141 86 Stockholm; Sweden
2. Departments of Medicine, Sahlgrenska University Hospital, Gothenburg University, S-413 45 Gothenburg, Sweden
3. Departments of Clinical Chemistry & Transfusion Medicine, Sahlgrenska University Hospital, Gothenburg University, S-413 45 Gothenburg, Sweden