Affiliation: | 1. Department of Anaesthesia, Klinikum Bamberg, , Bamberg, Germany;2. Department of Anaesthesia, Universit?tsklinkum Aachen, , Aachen, Germany;3. Department of Anaesthesia, Universitair Zieckenhuis Leuven, , Leuven, Belgium;4. Department of Occupational, Social and Environmental Medicine, University Medical Center G?ttingen, , G?ttingen, Germany |