[1
]
Department of Anaesthesia and Intensive Care Medicine, Centre Hospitalier de Luxembourg,
4, rue Barblé, L-1210 Luxembourg, Luxembourg. Electronic address: stammet.pascal@chl.lu.
[2
]
Competence Centre for Methodology and Statistics, Centre de Recherche Public de la
Santé (CRP-Santé), 1A-B, rue Thomas Edison, L-1445 Strassen, Luxembourg.
[3
]
Department of Anaesthesia and Intensive Care Medicine, Centre Hospitalier de Luxembourg,
4, rue Barblé, L-1210 Luxembourg, Luxembourg.
[4
]
Laboratory of Cardiovascular Research, Centre de Recherche Public de la Santé (CRP-Santé),
84, Val Fleuri, L-1526 Luxembourg, Luxembourg.