1. Department of Neurology, Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, the Netherlands (M.S.E., J.I.V., M.M.I.S., E.M.B., C.J.M.K., A.M.T., F.-E.d.L.).
2. Department of Neurology, Amphia Hospital, Breda, the Netherlands (M.E.v.A., A.G.W.v.N).
3. Department of Neurology, Medisch Spectrum Twente, Enschede, the Netherlands (P.J.A.M.B., R.M.A.).
4. Department of Neurology, Canisius-Wilhelmina Hospital, Nijmegen, the Netherlands (G.W.v.D.).
5. Department of Neurology, Catharina Hospital, Eindhoven, the Netherlands (R.A.R.G., I.W.M.v.U).
6. Department of Neurology, Franciscus Gasthuis & Vlietland, Rotterdam, the Netherlands (T.d.H.).
7. Department of Neurology, Elisabeth-TweeSteden Hospital, Tilburg (P.L.M.d.K.).
8. Department of Neurology, Haga Hospital, The Hague, Netherlands (K.F.d.L.).
9. Department of Neurology, Rijnstate Hospital, Arnhem, the Netherlands (S.E.V.).
10. Department of Neurology, Jeroen Bosch Hospital, ‘s-Hertogenbosch, the Netherlands (M.S.G.v.Z.).
11. Department of Neurology, Maastricht University Medical Centre, Maastricht, the Netherlands (R.J.v.O.).
12. Department of Neurology, Leiden University Medical Centre, Leiden, the Netherlands (M.J.H.W.).
13. Department of Neurology, Amsterdam University Medical Centres, Amsterdam, the Netherlands (P.J.N., T.P.Z.).
14. Department of Neurology, Albert Schweitzer Hospital, Dordrecht, the Netherlands (Henk Kerkhoff, MD, PhD).
15. Department of Neurology, Zuyderland Hospital, Sittard-Geleen, the Netherlands (F.A.R.).
16. Department of Neurology, Medical Centre Leeuwarden, Leeuwarden, the Netherlands (F.G.v.R.).
17. Department of Neurology, Haaglanden Medical Center, the Hague, the Netherlands (I.R.v.d.W.).