1 Department of Stereotactic and Functional Neurosurgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.
2 European Graduate School of Neuroscience (EURON), Maastricht, Netherlands.
3 Department of Psychological Sciences, University of San Diego, San Diego, CA, United States.
4 Department of Neurosurgery, Maastricht University Medical Center, Maastricht, Netherlands.