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Figure 2 Plot showing luciferase activity in skeletal muscle, liver, anterior myocardium, and posterior myocardium four days after delivery of microbubbles containing adenovirus encoding the luciferase gene under a cytomegalovirus promoter (ADV) using ultrasound-targeted microbubble destruction. Triggered ultrasound is shown in cross-hatched bars; continuous ultrasound in white bars. Control groups of rats receiving ADV without microbubbles (black bars) and microbubbles without ADV (not shown due to no activity) are also included. Error bars show one standard deviation. US = ultrasound.