1. Department of Epidemiology Johns Hopkins Bloomberg School of Public Health Baltimore MD USA
2. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden
3. Department of Medicine Unit of Cardiology, Heart and Vascular Theme, Karolinska Institutet, Karolinska University Hospital Stockholm Sweden
4. Department of Clinical Sciences Danderyd Hospital, Karolinska Institutet Stockholm Sweden