Additional file 3.

Validation of ALBIA-NAM. A positivity cutoff of the multiplex assay (dotted line) was determined as the 99th percentile of the healthy donors’ distribution (open circles) for both (A) anti-SRP (9 AU/mL) and (B) anti-HMGCR aAbs (8 AU/mL). Sera from patients with different inflammatory/autoimmune conditions including rheumatoid arthritis (RA), systemic sclerosis (SS), systemic lupus erythematosus (SLE), dermatomyositis (DM), anti-tRNA synthetase aAb-positive myositis or inclusion body myositis (IBM), as well as patients with polyclonal hypergammaglobulinemia were assayed. aAbs, autoantibodies; ALBIA, addressable laser bead immunoassay; AU, arbitrary units; HMGCR, 3-hydroxy-3-methylglutaryl coenzyme A reductase; NAM, necrotizing autoimmune myopathies; SRP, signal recognition particle.

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Drouot et al. Arthritis Research & Therapy 2014 16:R39   doi:10.1186/ar4468