1. Coma Science Group, Cyclotron Research Center & GIGA Research Center, University and University Hospital of Liège, Liège, Belgium.
2. Department of Data-Analysis, University of Ghent, Ghent, Belgium.
3. Department of Biomedical and Clinical Sciences “Luigi Sacco,” University of Milan, Milan, Italy.
4. Department of Psychiatry, University of Wisconsin, Madison, Wisconsin.
5. Medical Image and Signal Processing Group, Department of Electronics and Information Systems, Ghent University-IBBT, Ghent, Belgium.