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Picture showing the quantity and density of Cy3-siRNA-positive cells in retina-stretched preparation transducted by UTMD or/and Lipofectamine2000. US, ultrasound exposure (1MHz, 2W/cm2, 50%, 100Hz, 300 seconds); MBs, SonoVue®; microbubble contrast agents (2μL); L, Lipofectamine2000 (0.2 nmol) (100×magnification).
