LEFTY2 and ovarian carcinoma: As was shown in the box plot in the Oncomine database, the TGF-β1, TGF-β3, and TGF-β4 mRNA expression levels between ovarian carcinoma and normal ovarian tissues showed no significant differences (P = 0.57, Figure 5(a); P = 0.994, Figure 5(b); and P = 0.749, Figure 5(c), respectively).