1. Institute of Clinical Sciences, University of Oslo, Sognsvannsveien 9, Oslo, Norway
2. Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital, Sogn Arena, Nydalen, Oslo, Norway
3. Leeds Institute of Cardiovascular and Metabolic Medicince, Clarendon Way, University of Leeds, Leeds, UK
4. Department of Cardiology, Vestfold Hospital Trust, N-3103 Toensberg, Norway
5. Department of Medicine, Drammen Hospital, Vestre Viken Trust, Wergelandsgate 10, Drammen, Norway
6. Department of Cardiology B, Oslo University Hospital, Ullevaal, Kirkeveien 166, Oslo, Norway