1. Institute of Medical Informatics, Medical Faculty of RWTH Aachen University, Aachen, Germany
2. Department of Health Services Research, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
3. Oldenburger Research Network of Emergency Services and Intensive Care, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
4. Division of Epidemiology and Biometry, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany