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FTIR spectra of (A) MTX, (B) PLGA, (C) PEG4000, (D) physical mixture of MTX, PLGA, and PEG4000, and (E) MTX-loaded implants.
Abbreviations: FTIR, Fourier transform infrared spectroscopy; MTX, methotrexate; PEG, polyethylene glycol; PLGA, poly(D,L-lactide-co-glycolide).
