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Histological analysis of PBNC-labeled stem cells. Stem cells were double-labeled with PBNCs and a green fluorescent dye prior to injection into the spinal cord. Brightfield microscopy of (a) PBNC-labeled stem cells and (b) eosin-stained spinal cord tissue. Blue pigment indicates PBNCs. (c) Confocal microscopy of DAPI stained spinal cord tissue and double-labeled stem cells.
