[1] Univ Gothenburg, Inst Hlth & Care Sci, Sahlgrenska Acad, SE-40530 Gothenburg, Sweden
[2] Univ Gothenburg, Vardal Inst, SE-40530 Gothenburg, Sweden
[3] Sahlgrens Acad, Dept Emergency, Gothenburg, Sweden
[4] Sahlgrens Acad, Dept Cardiovasc Med, Gothenburg, Sweden