[Intramuscular virus-like structures in rheumatoid arthritis with acute fatal polymyositis].
D000368:Aged; D001172:Arthritis, Rheumatoid / Q000382:microbiology*; D005260:Female; D006801:Humans; D007366:Intercostal Muscles / Q000382:microbiology*; D009220:Myositis / Q000382:microbiology* / Q000401:mortality; D014780:Viruses / Q000302:isolation & purification*