[1] Reg Hosp Randers, Clin Res Unit, DK-8930 Randers NE, Denmark
[2] Reg Hosp Randers, Dept Internal Med, Skovlyvej 1, Randers NE, Denmark
[3] Aarhus Univ Hosp, Res Ctr Emergency Med, DK-8000 Aarhus, Denmark
[4] Aarhus Univ Hosp, Dept Clin Epidemiol, DK-8000 Aarhus, Denmark
[5] Aarhus Univ Hosp, Dept Cardiol, DK-8000 Aarhus, Denmark
[6] Aarhus Univ, Inst Clin Med, Aarhus, Denmark