Affiliation: | (1) Resident, Department of Anaesthesiology, University Hospital Aachen, Aachen, Germany;(2) Medical Student, Department of Anaesthesiology, University Hospital Aachen, Aachen, Germany;(3) Professor, Department of Anaesthesiology, University Hospital Aachen, Aachen, Germany;(4) Professor and Chairman, Department of Anaesthesiology, University Hospital Aachen, Aachen, Germany |