LDHC and idiopathic pulmonary fibrosis: Specifically, mean percentages of LDH isoforms in control AEC2 vs. IPF AEC2, respectively, were: LDH1 6.4% vs. 0.8%, p = 0.13; LDH2 29.4% vs 11.3%, p = 0.002; LDH3 38.4% vs. 24.9%, p = 0.03; LDH4 18.7% vs. 40.2%, p = 0.05; LDH5 7.1% vs. 23.0%, p = 0.04.