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(A) Far-red fluorescence emission after (B) direct injection or (C) encapsulation in PEGDA hydrogel of AdBMP2-AdiRFP transduced hMSC-iCasp9 cells into NOD/SCID mice in the presence or absence of CID. Quantification of fluorescence intensity in mice receiving these cells (Day 0) in the absence and presence of CID was reported as the mean ± standard error of the mean for n = 4. * Represents significant difference of fluorescence intensity between groups (P <0.05).
