[1] Sahlgrenska Univ Hosp Molndal, Dept Anaesthesia, Sahlgrenska Acad, Inst Clin Sci, Gothenburg, Sweden
[2] Univ Gothenburg, Sahlgrenska Acad, Inst Hlth & Care Sci, Gothenburg, Sweden
[3] Univ Skovde, Sch Life Sci, Skovde, Sweden
[4] Orebro Univ Hosp, Dept Anaesthesia & Intens Care, Orebro, Sweden
[5] Karolinska Inst, Dept Clin Sci Intervent & Technol, Unit Anaesthesia, Stockholm, Sweden
[6] Karolinska Inst, Dept Anaesthesia & Intens Care, Div Physiol & Pharmacol, Stockholm, Sweden