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Gel preparations in different states. (A) Liquid blank carrier PCEC/HA, (B) positive PCEC/HA blank gel, (C) inverted PCEC/HA blank gel, (D) free curcumin aqueous solution, (E) orthotopic Cur/HA hyaluronic acid gel, and (F) inverted Cur/HA sodium hyaluronate gel. PECE, PCL-b-PEG-b-PCL; HA, hyaluronic acid.
