1. Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
2. Department of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
3. Department of Medicine, Karolinska Institutet, Stockholm, Sweden
4. Department of Cardiology, Karolinska University Hospital, Stockholm, Sweden
5. Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden