[1] Karolinska Univ Hosp, Dept Cardiothorac Surg & Anesthesiol, S-17176 Stockholm, Sweden
[2] Karolinska Inst, Dept Mol Med & Surg, Stockholm, Sweden
[3] Karolinska Univ Hosp, Dept Emergency Med, S-17176 Stockholm, Sweden
[4] Karolinska Inst, Dept Internal Med, S-10401 Stockholm, Sweden