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p75 positive Schwann cell-like ITSCs were closely located to nerve fibers. Nerve fibers were embedded to connective tissue containing collagen fibers (c). p75 expression was detectable by nanogold silver-intensified particles which were identified at the surface of the cell membrane (arrowheads). Arrows indicate axons closely related to nonmyelinating Schwann cells (asterisk). Scale bar: 1μm.
