Correction to: Journal of Neurology (2021) 268:1643–1664 https://doi.org/10.1007/s00415-019-09498-4

The original version of this article unfortunately contained a mistake. Affiliation details for Jayne L. Chamberlain were incorrectly given as “Ipsen Biopharm Ltd, 9 Ash Rd N, Wrexham LL13 9UF, UK” but should have been Ruthin, UK, e-mail: drjlc1000@gmail.com