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. 2020 Aug 6;15:5855–5871. doi: 10.2147/IJN.S247088

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© 2020 Tao et al.

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SEM images of the surfaces of VCM/Gel and VCM-NPs/Gel after incubation in PBS 7.4 aqueous medium at 37°C with 0 days, 10 days and 20 days. Note: SEM images of VCM/Gel and VCM-NPs/Gel (0 d) were same as Figure 3 (J, K) duo to clear comparative analysis of gel surfaces changes with degradation.