1 Department of Intensive Care Medicine and University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.
2 Department of Neurology and Neurosurgery and University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.
3 Department of Intensive Care Medicine, Radboud Institute of Health Science, Radboud University Medical Center Nijmegen, Nijmegen, The Netherlands.
4 Department of Neurology, UZ Brussel, Brussels, Belgium.