title: Editorial.
authors.affiliation: National Institute of Neurological Disorders and Stroke/NIH, Bethesda, MD, USA. E-mail: carsten.bonnemann@nih.gov.
authors.forename: Carsten G
authors.initials: CG
authors.lastname: Bönnemann
authors.affiliation: Institute of Genetic Medicine Newcastle University, Newcastle upon Tyne, UK. E-mail: hanns.lochmuller@ncl.ac.uk.
authors.forename: Hanns
authors.initials: H
authors.lastname: Lochmüller