1. Department of Critical Care University Medical Center Groningen University of Groningen GroningenThe Netherlands
2. Department of Neurology University Medical Center Groningen University of Groningen GroningenThe Netherlands
3. Department of Cardiac Surgery University Medical Center Groningen University of Groningen GroningenThe Netherlands
4. Department of Anesthesiology University Medical Center Groningen University of Groningen Groningen The Netherlands