1. Department of Intensive Care Medicine (D.M., G.V.d.B., P.J.W., I.M.), University Hospitals of the Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
2. Medical Intensive Care Unit (J.W., A.W.), University Hospitals of the Katholieke Universiteit Leuven, B-3000 Leuven, Belgium