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Histology in longitudinal section of a CNTF device after removal at 6 months from the study eye of a Phase-IB participant. Histology of a comparable device that was not implanted is shown for comparison. NTC-201 cells are evident at approximately equal density on the poly(ethylene terephthalate) yarn scaffold. No macrophages were found in any explanted device. Shown are 4-μm-thick sections embedded in glycol methacrylate and stained with hematoxylin and eosin. (Magnification, ×10.)
