1. Department of Neurosurgery, Amsterdam University Medical Centers, location AMC, University of Amsterdam, Amsterdam, The Netherlands.
2. Department of Primary and Community Care, Centre for Family Medicine, Geriatric Care and Public Health, Radboud University Medical Centre, Nijmegen, The Netherlands.
3. GIGA Consciousness, University of Liège, Liège, Belgium; Coma Science Group, University Hospital of Liège, Liège, Belgium.