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TEM images of PEG–PLA micelles. (A) PEG5000–PLA3900 blank micelle. (B) rhEPO-loaded PEG2000–PLA3800 micelle. (C) rhEPO-loaded PEG5000–PLA3900 micelle. (D) rhEPO-loaded PEG10,000–PLA3600 micelle.
Abbreviations: TEM, transmission electron microscopy; PEG–PLA, poly(ethylene glycol)–poly(d,l-lactide).
