1 From the Department of Anaesthesiology and Intensive Care, University Hospital of Poitiers (VA, CG, DF, CD-F), University of Medicine and Pharmacy of Poitiers, Poitiers (DF, CD-F), INSERM UMR1246 - Methods in Patient-Centred Outcomes and Health Research, Nantes (DF) and INSERM UMR1070, University of Medicine and Pharmacy of Poitiers, Poitiers, France (CD-F).