TLR3 and idiopathic pulmonary fibrosis: Specifically, mRNA transcript levels for TLR3 were lower in the cultures from IPF patients compared to the infected primary cultures from healthy donors with ratio of the means 0.01 (p = 0.0.28), while for TLR9 the ratio of the means was 0.00 (undetectable in the IPF cultures, p = 0.019).