[1] Falun Cent Hosp, Dept Cardiol, S-79182 Falun, Sweden
[2] Uppsala Univ, Dept Med Sci, Uppsala, Sweden
[3] Uppsala Univ, Uppsala Clin Res Ctr, Uppsala, Sweden
[4] Sahlgrens Univ Hosp, Dept Cardiol, Cardiovasc Inst, Gothenburg, Sweden
[5] Gavle Cent Hosp, Heart Unit, Dept Med, Gavle, Sweden
[6] Gothenburg Univ, Sahlgrenska Acad, Inst Neurosci & Physiol Physiotherapy, Gothenburg, Sweden
[7] Univ Orebro, Sch Hlth & Med Sci, Orebro Univ Hosp, Dept Cardiothorac & Vasc Surg, SE-70182 Orebro, Sweden
[8] Lund Univ, Dept Clin Sci Lund, Div Cardiothorac Surg, S-22100 Lund, Sweden
[9] Skane Univ Hosp, Lund, Sweden
[10] Umea Univ, Dept Publ Hlth & Clin Med, Cardiol & Heart Ctr, Umea, Sweden
[11] Linnaeus Univ Kalmar Vaxjo, Sch Hlth & Caring Sci, Kalmar, Sweden
[12] Lund Univ, Skane Univ Hosp, Inst Clin Sci, Dept Cardiol, S-22100 Lund, Sweden
[13] Karolinska Inst, Karolinska Univ Hosp, Dept Cardiol, Inst Med H7, Stockholm, Sweden