title: Electromyography in polymyositis and dermatomyositis.
authors.forename: E J
authors.initials: EJ
authors.lastname: Fredericks
mesh_terms: D000328:Adult; D003882:Dermatomyositis / Q000503:physiopathology*; D004576:Electromyography; D006801:Humans; D009132:Muscles / Q000503:physiopathology; D017285:Polymyositis / Q000503:physiopathology*