ANA, antinuclear antibody; ANCA, antineutrophil cytoplasmic antibody; c-ANCA, cytoplasmic ANCA; CD, celiac disease; dsDNA, double-stranded DNA; EF, ejection fraction; GBM, glomerular basement membrane; IPH, idiopathic pulmonary hemosiderosis; P-ANCA, perinuclear ANCA; RF, rheumatoid factor; RNP, ribonucleoprotein; TTG, tissue transglutaminase. This evidence concerns the gene TGM2 and celiac disease.