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. 2021 Aug 6;16:5301–5315. doi: 10.2147/IJN.S323033

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© 2021 Yu et al.

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Characterization of MHAP nanoparticles: (A) SEM image; (B) TEM image; (C) N2 adsorption–desorption isotherms; and (D) BJH pore size distribution curve.