Erratum to: J Neurol DOI 10.1007/s00415-009-5065-y

Unfortunately, one paragraph under the heading “Reference material and normal values” was published with errors. The correct formula is given here.

The Z-score was calculated according to the formula:

[LnIENF (patient value) − (2.733 − 0.004 * age − 0.178 * gender (1 men, 0 women))]/0.343.