1. Rijnland Ziekenhuis Leiderdorp; Department of Neurology; Simon Smitweg 1 Leiderdorp Netherlands 2353 GA
2. University Medical Center Utrecht; Julius Center for Health Sciences and Primary Care/University Department of Neurology; PO Box 85500 Utrecht Netherlands 3508 GA
3. University Medical Center Utrecht; Department of Neurology; PO Box 85500 Utrecht Netherlands 3508 GA
4. Erasmus MC; Department of Neurology; s Gravendijkwal 230 Rotterdam Netherlands 3015 GD