[1] Franciscus Gasthuis & Vlietland, Emergency Dept, Rotterdam, Netherlands
[2] Elisabeth Tweesteden Hosp, Emergency Dept, Tilburg, Netherlands
[3] Univ Dresden, Div Thrombosis & Hemostasis, Dresden, Germany
[4] Univ Manchester, Fac Biol Med & Hlth, Div Cardiovasc Sci, Manchester, England
[5] Charite, Campus Virchow, Emergency & Acute Med, Berlin, Germany
[6] Univ Coll London Hosp, Dept Gastroenterol, London, England
[7] Northern Care Alliance NHS Fdn Trust, Manchester Acad Hlth Sci Ctr, Geoffrey Jefferson Brain Res Ctr, Manchester, England
[8] Univ Manchester, Manchester, England
[9] Northern Care Alliance NHS Fdn Trust, Manchester Ctr Clin Neurosci, Salford, England
[10] Univ Bern, Univ Hosp Bern, Inselspital, Dept Neurol, Bern, Switzerland
[11] Univ Cincinnati, Coll Med President, Dept Emergency Med, Cincinnati, OH USA
[12] Franciscus Gasthuis & Vlietland, Emergency Dept, Kleiweg 500, NL-3045 Rotterdam, Netherlands