Different Autoantibody Phenotypes in Juvenile and Adult Myositis A Kyoto University study compared juvenile-idiopathic inflammatory myopathy (IIM) and adult-IIM patients, demonstrating different autoantibody profiles and a more favorable outcome for n juvenile-IIM patients.… https://t.co/4fgkNJeO4i https://t.co/Z2lDloBzrI