1 Department of Emergency Medicine, Medical University of Vienna, Waehringer Guertel 18-20/6D, Vienna, Austria. Electronic address: Matthias.mueller@meduniwien.ac.at.
2 Department of Anesthesiology, Perioperative Medicine and Intensive Care Medicine, Paracelsus Medical University of Salzburg, Austria.
3 Department of Emergency Medicine, Medical University of Vienna, Waehringer Guertel 18-20/6D, Vienna, Austria.