[Polymyositis].
D001706:Biopsy; D004576:Electromyography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009220:Myositis / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology; D011241:Prednisone / Q000627:therapeutic use
D011241:Prednisone
Polymyositis.