[1] Aarhus Univ Hosp, Dept Cardiol, Aarhus, Denmark
[2] Copenhagen Univ Hosp, Rigshosp, Dept Cardiol, Copenhagen, Denmark
[3] Copenhagen Univ Hosp, Rigshosp, Dept Cardiothorac Surg, Copenhagen, Denmark
[4] Herlev & Gentofte Univ Hosp, Dept Cardiol, Gentofte, Denmark
[5] Odense Univ Hosp, Dept Cardiothorac & Vasc Surg, Odense, Denmark
[6] Odense Univ Hosp, Dept Cardiol, Odense, Denmark
[7] Aalborg Univ Hosp, Heart & Lung Clin, Aalborg, Denmark
[8] Aalborg Univ Hosp, Clin Nursing Res Unit, Aalborg, Denmark
[9] Aalborg Univ, Dept Clin Med, Aalborg, Denmark