title: Changing electromyographic findings during the chronic course of polymyositis.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D002908:Chronic Disease; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009046:Motor Neurons; D009132:Muscles / Q000503:physiopathology*; D009220:Myositis / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology*; D011239:Prednisolone / Q000627:therapeutic use*
chemical_list: D011239:Prednisolone