STAT3 and esophageal squamous cell carcinoma: Several experiments were used to study the efficiency of STAT3 ODN-decoy delivery into esophageal squamous cell carcinoma EC9706 cells, such as (i) ultrasonic microbubbles plus ultrasonic irradiation, (ii) liposomes plus ultrasonic irradiation, (iii) ultrasonic irradiation alone, and the application of (iv) ultrasonic microbubbles.