Fig. 2From: A prospective stepped wedge cohort evaluation of the new national trauma team activation criteria in Sweden – the TRAUMALERT studyIllustration of the step-wedge prospective inclusion of patients in the study, including the time for change of Trauma Team Activation (TTA) criteria, per center. The number of trauma cases registered in the Swedish trauma registry per month during the period 2014–2016 is illustrated for referenceBack to article page