From the Department of Anesthesia (GRADM, SGM), Department of Critical Care Medicine, Antwerp University Hospital, Edegem (GRADM), Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp (GRADM), Department of Intensive Care Medicine, Ghent University Hospital (TS) and Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium (TS)

Correspondence to Tom Schepens, Department of Intensive Care Medicine, Ghent University Hospital, C. Heymanslaan 10, B-9000 Gent, Belgium. E-mail: [email protected]