1 From the Department of Anaesthesiology and Pain Medicine, Jessa Hospital, Hasselt (KN, HJ, IC, BS), UHasselt, Faculty of Medicine and Life Sciences, Diepenbeek (KN, IC, BS), KU Leuven, Department of Cardiovascular Sciences, Leuven (KN, MVdV) and Department of Anaesthesiology and Pain Medicine, University Hospitals Leuven, Leuven, Belgium (KN, MVdV).