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Cumulative release of SDF-1α from PLGA microspheres in DPBS at 37°C. Replicate batches of Formulation A are shown in panel (a), while one representative release curve of all other formulations is shown in (b). The amount of SDF-1α in release samples was determined by ELISA and is expressed as the cumulative percent of the feed mass of SDF-1α loaded during microsphere fabrication. Details of microsphere formulations are shown in Table I
