Clinical characteristics and concordance of anti-MDA5 autoantibodies: A multicentre Australian study.
OBJECTIVES In Australia, anti-MDA5 antibodies are exclusively tested by line immunoblot assay (LIA). The clinical concordance of a LIA-positive anti-MDA5 result is unclear. We aimed to describe the clinical features and determine the clinical concordance of patients with anti-MDA5 antibodies. METHODS Electronic recor...