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Gene expression of TMPRSS4 was quantified by real-time PCR in total RNA obtained from IPF (n = 7), hypersensitivity pneumonitis (HP) (n = 6) and normal lungs (n = 4). Strong upregulation was observed in IPF tissues compared with HP and control lungs. Data are expressed as means ± SD of copy number normalized to 18S rRNA; * p<0.05, IPF versus control and HP.
