[1] Karolinska Inst, Div Cardiol, Dept Med, Stockholm, Sweden
[2] Uppsala Univ, Dept Med Sci, Uppsala, Sweden
[3] Linkoping Univ, Dept Med & Hlth Sci, Linkoping, Sweden
[4] Linkoping Univ, Dept Cardiol, Linkoping, Sweden
[5] San Raffaele Pisana Hosp IRCCS, Dept Med Sci, Ctr Clin & Basic Res, Rome, Italy
[6] Univ Hosp Riuniti, Dept Cardiol, Trieste, Italy