1 ICU Department, Centre Hospitalier Universitaire Brugmann/Brugmann University Hospital, 4, Place Arthur Van Gehuchten, 1020, Brussels, Belgium. Patrick.Honore@CHU-Brugmann.be.
2 ICU Department, Centre Hospitalier Universitaire Brugmann/Brugmann University Hospital, 4, Place Arthur Van Gehuchten, 1020, Brussels, Belgium.
3 Ageing and Pathology Research Group, Vrije Universiteit Brussel, Brussels, Belgium.