Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine (P.M., E.B., B.P., S.V.P., P.J.W., L.L., G.V.d.B.), KU Leuven, 3000 Leuven, Belgium; Medical Intensive Care Unit, Department of General Internal Medicine (P.M.), University Hospital Leuven, 3000 Leuven, Belgium; and Department of Intensive Care Medicine (E.B., B.P., P.J.W., L.L., G.V.d.B.), University Hospital Leuven, 3000 Leuven, Belgium.