1 Department of Emergency Medicine, University of Groningen, University Medical Center Groningen, 9700 RB Groningen, Netherlands. Electronic address: v.m.quinten@umcg.nl.
2 Department of Critical Care, University of Groningen, University Medical Center Groningen, 9700 RB Groningen, Netherlands; Department of Pathology and Medical Biology, Medical Biology section, University of Groningen, University Medical Center Groningen, 9700 RB Groningen, Netherlands.
3 Department of Emergency Medicine, University of Groningen, University Medical Center Groningen, 9700 RB Groningen, Netherlands.