[1] Univ Oslo, Rikshosp, Oslo Univ Hosp, Cardiol, N-0027 Oslo, Norway
[2] Sahlgrens Univ Hosp, Cardiol, Gothenburg, Sweden
[3] Rigshosp, Cardiol, DK-2100 Copenhagen, Denmark
[4] Skejby Univ Hosp, Cardiol, Aarhus, Denmark
[5] Skane Univ Hosp, Cardiol, Lund, Sweden
[6] Univ Oslo, Rikshosp, Oslo Univ Hosp, Res Inst Internal Med, N-0027 Oslo, Norway
[7] Novartis Norge, Oslo, Norway