title: Primary lateral sclerosis: disease, syndrome, both or neither?
authors.forename: L P
authors.initials: LP
authors.lastname: Rowland
mesh_terms: D000690:Amyotrophic Lateral Sclerosis / Q000209:etiology; D004576:Electromyography; D006801:Humans; D016472:Motor Neuron Disease / Q000150:complications / Q000175:diagnosis*; D013577:Syndrome