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. 2020 Jul 23;15:5203–5215. doi: 10.2147/IJN.S253094

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© 2020 Lu et al.

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(A–C), Transmission electron microscopy (TEM) images of bovine serum albumin (BSA), metformin-BSA (met-BSA) and enlarged met-BSA, respectively. (D) is the differential scanning calorimetry (DSC) result. c(BSA) = 1 ×10⁻⁶ M; c(metformin)= 2.5×10⁻⁵ M.