1 Department of Cardiology, Oslo University Hospital Ulleval, Oslo, Norway. danat@uio.no.
2 Institute of Clinical Sciences, University of Oslo, Oslo, Norway. danat@uio.no.
3 Department of Medicine, Drammen Hospital, Vestre Viken Trust, Drammen, Norway.
4 Department of Behavioral Medicine, University of Oslo, Oslo, Norway.
5 Division of Cardiology, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.
6 Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden.
7 Centro Nacional de Investigaciones Cardiovasculares (CNIC) & Department of Cardiology, Instituto de Investigacion Sanitaria-Fundacion Jimenez Diaz-UAM, Madrid, Spain.