COL15A1 and hepatocellular carcinoma: As shown in Fig. 9, the expression levels of COL15A1 (Fig. 9a for negative and Fig. 9b for positive), N4BP3 (Fig. 9c for negative and Fig. 9d for positive), NDST3 (Fig. 9e for negative and Fig. 9f for positive), and PZP (Fig. 9g for negative and Fig. 9h for positive) were significantly different between the normal tissues and HCC specimens.