[1] Katholieke Univ Leuven Hosp, Med Intens Care Unit, Louvain, Belgium
[2] Katholieke Univ Leuven Hosp, Dept Intens Care Med, Louvain, Belgium
[3] Uppsala Univ, Dept Clin Neurophysiol, Uppsala, Sweden
[4] Katholieke Univ Leuven Hosp, Dept Phys Med & Rehabil, Louvain, Belgium
[5] Katholieke Univ Leuven Hosp, Dept Abdominal Surg, Louvain, Belgium