1 GIGA-Consciousness, Coma Science Group, University of Liège, Belgium. Electronic address: athibaut@uliege.be.
2 School of Computing, University of Kent, United Kingdom; Department of Clinical Neurosciences, University of Cambridge, United Kingdom; The Alan Turing Institute, United Kingdom.
3 GIGA-Consciousness, Coma Science Group, University of Liège, Belgium.