title: Motor neuron disease: progressive muscular atrophy in the ALS spectrum.
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Maragakis
mesh_terms: D017668:Age of Onset; D000690:Amyotrophic Lateral Sclerosis / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D009134:Muscular Atrophy, Spinal / Q000145:classification* / Q000503:physiopathology*