1 Ghent University, Faculty of Medicine and Health Sciences, Ghent, Belgium.
2 The National Hospital, London, UK.
3 Neurology Division, Department of Clinical Neurosciences, University Hospital of Geneva, Geneva, Switzerland.
4 Department of Psychiatry and Department of Anatomy & Neurosciences, VU University Medical Centre, Amsterdam Neuroscience, Amsterdam, The Netherlands.
5 Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, The Netherlands.