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Th possible secondary cause of myositis, such as thyroid disease and drug, were excluded. All of the patients were females. Fourteen patients (87.5 ) were African Americans and two (12.5 ) were Caucasians with ages that ranged from 15 to 69 years. Among these 16 patients, 12 (75 ) were found to have anti-Ro autoantibodies. The remaining four patients were not tested for anti-Ro. Five patients (41.

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