TGFBR2 and nasopharyngeal carcinoma: We applied qRT-PCR to confirm that miR-93 was highly expressed in NPC samples (Figure 2B) and 5 NPC cell lines (Additional file 2: Figure S4), and also observe that TGFβR2 expression was inversely correlated with miR-93 expression (R2 = 0.3995) (Figure 2C, Additional file 2: Figure S3), suggesting that miR-93 may regulate TGFβR2.