1. Department of Emergency Medicine, Solna, Karolinska University Hospital, Anna Steckséns gata 33, Stockholm SE-171 76, Sweden
2. Department of Medicine, Solna, Karolinska Institutet, Stockholm SE-17177, Sweden
3. Department of Clinical Sciences, Danderyd University Hospital, Karolinska Institutet, Stockholm SE-18288, Sweden
4. Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm SE-11883, Sweden
5. Division of Biostatistics, Institute of Environmental Medicine, Nobels väg 13, Karolinska Institutet, Stockholm SE-17177, Sweden
6. Department of Cardiology, Skåne University Hospital, Jan Waldenströms gata 15, Malmö SE-20502, Sweden
7. Department of Clinical Sciences Malmö, Lund University, Box 50332, Malmö SE-20213, Sweden
8. Department of Cardiology, Falu Hospital, Lasarettsvägen, Falun SE-79182, Sweden
9. Department of Cardiology, Södersjukhuset, Sjukhusbacken 10, Stockholm SE-11883, Sweden