1. Department of Cardiology, Aarhus University Hospital , Palle Juul-Jensens Bvld 99 , DK-8200 Aarhus, Denmark
2. Department of Clinical Medicine, Aarhus University , Palle Juul-Jensens Bvld. 99 , DK-8200 Aarhus, Denmark
3. Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena , Modena , Italy
4. The Danish Center for Social Science Research, VIVE , Copenhagen , Denmark