Erratum to: J Neurol (2009) 256:1860–1868 DOI 10.1007/s00415-009-5210-7

The article was published without acknowledgement. The Acknowledgement is given here.

Acknowledgements

This work has been funded by the grant AS-90-2007 awarded by the Alzheimer’s Society to Sergio Della Sala and Robert H. Logie.