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Wound healing of diabetic rats in each group after treatment for different periods. (A) The wound size was markedly reduced in the US treatment group compared with the control group. (B) The wound healing rate in the US treatment group was increased compared with the control group at the 7th day. As the treatment time prolonged, the difference of wound healing rate became more marked between the US and control group. *P<0.05, **P<0.01 and ***P<0.001 as indicated. US, ultrasound
