Erratum to: Acta Neurol Belg DOI 10.1007/s13760-012-0150-x

In the published original article, Abstract section, the numbers of the patient group and control group are not given correctly.

The correct numbers are:

24 females, 16 males in the patient group (not 18 females, 12 males).

22 females, 18 males in the control group (not 16 females, 14 males).