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In vitro AVT-enhanced drug delivery. (A) Sequential microscopic images of the glass with different drug delivery sequence (AVT + fragmentation, ARF + fragmentation, and fragmentation only). Note that the MBs concentration was 40 × 106 MBs per milliliter ARF: 160 kPa, 30% duty cycle; fragmentation: 1,600 kPa, a single pulse, five cycles. (B) The corresponding fluorescence intensity of each groups.
