[1] Trondheim Reg & Univ Hosp, St Olavs Hosp, Dept Cardiothorac Surg, Trondheim, Norway
[2] Trondheim Reg & Univ Hosp, St Olavs Hosp, Dept Cardiol, Trondheim, Norway
[3] Norwegian Univ Sci & Technol NTNU, Fac Med & Hlth Sci, Dept Circulat & Med Imaging, Trondheim, Norway
[4] Norwegian Univ Sci & Technol NTNU, Fac Med & Hlth Sci, Dept Publ Hlth & Nursing, Trondheim, Norway
[5] VID Specialized Univ, Haraldsplass, Bergen, Norway
[6] NTNU, Fac Med & Hlth Sci, Dept Publ Hlth & Nursing, Trondheim, Norway
[7] NTNU, Dept Circulat & Med Imaging, Trondheim, Norway
[8] Univ Oslo, Fac Med, Dept Nursing Sci, Oslo, Norway
[9] Oslo Univ Hosp, Dept Res & Dev, Div Emergencies & Crit Care, Oslo, Norway