Department of Neurology, Erasmus MC, Rotterdam, The Netherlands. m.titulaer@erasmusmc.nl|Department of Neurology, Erasmus MC, Rotterdam, The Netherlands. m.titulaer@erasmusmc.nl|Department of Neurology, Erasmus MC, Rotterdam, The Netherlands. m.titulaer@erasmusmc.nl|Department of Neurology, Erasmus MC, Rotterdam, The Netherlands. m.titulaer@erasmusmc.nl|Department of Neurology, Erasmus MC, Rotterdam, The Netherlands. m.titulaer@erasmusmc.nl|Department of Neurology, Erasmus MC, Rotterdam, The Netherlands. m.titulaer@erasmusmc.nl|Department of Neurology, Erasmus MC, Rotterdam, The Netherlands. m.titulaer@erasmusmc.nl