STAT3 and cancer: miRNA (miR)-23a promotes EMT in lung and gastric cancer cells by inhibiting the expression of E-cadherin, whereas miR-193a-3p, miR-210-3p, and miR-5100 promote cancer cell invasion by activating EMT through the signal transducer and activator of transcription 3 (STAT3) pathway.29, 30, 31