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M2-exosomes promote diabetic fracture healing in vivo. (A) Micro-CT 3D images of the whole femur after fracture. (B–C) A quantitative statistical analysis of the micro-CT results of the healing tissues was performed. n = 5. (D) Immunofluorescence localization of M2 (F4/80+ and CD206+) macrophages. Scale bar in all images: 100 μm. (E) M2 (F4/80+ and CD206+) macrophage quantization. n = 5. *P < 0.05; **P < 0.01; ***P < 0.001.
