1 Department of Neurology, Haga Teaching Hospital, Leyweg 275, 2545 CH The Hague, The Netherlands; Department of Neurology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands. Electronic address: m.f.contarino@amc.uva.nl.
2 University of Utrecht Medical School, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.
3 Department of Neurology, Haga Teaching Hospital, Leyweg 275, 2545 CH The Hague, The Netherlands.
4 Department of Neurology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.
5 Department of Neurology, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands.
6 Department of Neurology, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands.
7 Department of Neurology, Medisch Spectrum Twente, Haaksbergerstraat 55, 7513 ER Enschede, The Netherlands.
8 Department of Neurosurgery, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.