1 Department of Electronics and Information Systems, IBiTech, Ghent University, Ghent, Belgium; Department of Anesthesia and Critical Care, AZ Sint-Jan Brugge Oostende, Bruges, Belgium. Electronic address: Alainkalmar@gmail.com.
2 Department of Anesthesia and Critical Care, AZ Sint-Jan Brugge Oostende, Bruges, Belgium; Department of Anaesthesiology, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.
3 Department of Anaesthesiology, University Hospitals Leuven, Leuven, Belgium; Department of Cardiovascular Sciences, KU Leuven - University of Leuven, Leuven, Belgium.