Serum levels of LN, IV COL, PIIINP, and HA had significantly negative correlation with FVC (%pred) and DLCO (%pred) in PC19-PF patients (all p < 0.01, Table 4), and they were significantly positively correlated with HRCT scores (p < 0.01, Table 4; Figure 5). This evidence concerns the gene MLPH and pemphigus foliaceus.