Amplification of the entire BARD1 coding region (exon 1 to exon 11) showed no or very low expression of previously identified BARD1 isoforms in healthy tissues, but expression of FL BARD1 and BARD1β, as well as low expression levels of smaller isoforms was detected in IPF tissue samples (Fig. 6a). This evidence concerns the gene BARD1 and idiopathic pulmonary fibrosis.