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The major organs of rats in Rop-PELA group were sectioned and stained with hematoxylin and eosin 7 d after administration.
Notes: (A) Heart, (B) liver, (C) spleen, (D) lung, (E) kidney, (F) brain (×100).
Abbreviations: Rop, ropivacaine; PELA, poly ethylene glycol-co-poly lactic acid; d, day.
