Rheumatoid myopathy.
D000200:Action Potentials; D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000473:pathology / Q000503:physiopathology; D001706:Biopsy; D004576:Electromyography; D005356:Fibromyalgia / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D009132:Muscles / Q000473:pathology / Q000503:physiopathology; D009135:Muscular Diseases / Q000150:complications* / Q000503:physiopathology