RNPC3 and myositis disease: Tests for antinuclear and myositis-specific autoantibodies, including anti-Jo-1, PL-7, PL-12, EJ-, OJ, SRP, Mi-2, MDA-5, NXP-2, SAE-1, PM/Scl-100, SS-A 52kD, U1-RNP, U2-RNP, U3-RNP (fibrillarin), and hydroxymethylglutaryl-CoA reductase antibodies, were negative.