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Hematoxylin-eosin staining showing the morphology of RSC96 Schwann cells cultured with 0 µM (control), 1.5625 µM (A1), 3.125 µM (A2) and 6.25 µM (A3) andrographolide for 2, 4 and 6 days. Cell seeding density: 4×103/ml (original magnification, ×100).
