1 Center for Neurotechnology and Neurorecovery, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.
2 Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, USA.
3 Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium.
4 Centre du Cerveau2, University Hospital of Liège, Liège, Belgium.