TGFBR2 and nasopharyngeal carcinoma: Although many miRNAs (For example miR-26a [42,43], miRNA-18a [44], miR-18b [45], miR-218 [46], miR-216b [47], miR-663 [48], miR-155 [49], miR-205 [50], EBV-encoded miRNAs [51], etc.)have been reported to be involved in NPC carcinogenesis, no evidence was given for their associations with TGFβR2 down-regulation.