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Transmission scanning electron micrographs of CsA loaded mPEG-PLA micelles before lyophilization (A), after reconstitution (D) and after 3 months storage at 4 °C (E); (B) size distribution of CsA-loaded mPEG-PLA micelles; (C) zeta potential of CsA-loaded mPEG-PLA micelles; (F) lyophilized product appearance of six excipients.
