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Ultramicrophotographic images of remyelination following engraftment of neurotrophic factor secreting cells (NTF-SCs). Representative electron micrographs show myelinated and demyelinated axons in the spinal cord sections before and four weeks post cell transplantation. Control (A), lysophosphatidylcholines (LPC) (B), vehicle (C), NTF-SCs (D). Scale bar = 1000 nm
