title: Progressive weakness in infancy and childhood.
authors.forename: D W
authors.initials: DW
authors.lastname: Lewis
authors.forename: P H
authors.initials: PH
authors.lastname: Berman
mesh_terms: D001927:Brain Diseases / Q000150:complications*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D009046:Motor Neurons / Q000502:physiology; D009468:Neuromuscular Diseases / Q000209:etiology*; D013118:Spinal Cord Diseases / Q000150:complications*