1 Department of Anesthesiology and Intensive Care Medicine, Zealand University Hospital, Roskilde, Denmark martinvedel@gmail.com.
2 Department of Anesthesiology and Intensive Care Medicine, Zealand University Hospital, Roskilde, Denmark.
3 Department of Clinical Medicine, University of Copenhagen Faculty of Health and Medical Sciences, Copenhagen, Denmark.
4 Department of Anatomy, Histology and Embryology, Institute of Clinical and Functional Anatomy, Medical University of Innsbruck (MUI), Innsbruck, Austria.