Erratum to: J Neurol DOI 10.1007/s00415-012-6721-1

The original version of the article was unfortunately published with errors in the authors’ affiliations. The correct affiliations of authors Mohadeseh Mehrabian, Elahe Elahi and Sherifa Hamed are given below:

M. Mehrabian

Department of Biotechnology, University College of Science, University of Tehran, Tehran, Iran

Present address: Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, ON M5S 3H2, Canada

Department of Laboratory Medicine and Pathobiology, University of Toronto, ON M5S 1A8, Canada

E. Elahi

School of Biology and Department of Biotechnology, University College of Science, University of Tehran, Tehran, Iran

S. Hamed

Department of Neurology and Psychiatry, Assiut University Hospital, Floor # 4, Room # 4, P.O.Box 71516, Assiut, Egypt