LAUSR

In this issue of the Journal, Frasquet et al. report on the genetic spectrum of a large cohort of patients with distal hereditary motor neuropathy (dHMN) from two large centres in Spain1 . All patients underwent detailed clinical assessment by experts in neuromuscular disease and are likely to have an accurate diagnosis. As the centre in Valencia provides all neuromuscular services for a defined geographical area, these two factors have allowed the authors to calculate a population prevalence for dHMN.