1 Department of Anesthesiology, University Medicine of Greifswald, Fleischmannstr. 42-44, 17475 Greifswald, Germany.
2 Department of Anesthesiology & Intensive Care Medicine, Emergency Medicine & Pain Management, Dresden Friedrichstadt Hospital, Friedrichstr. 41, 01067 Dresden, Germany.
3 Department of Anesthesiology, University Medicine of Greifswald, Fleischmannstr. 42-44, 17475 Greifswald, Germany. Electronic address: [email protected].