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. 2021 Dec 23;9:807883. doi: 10.3389/fbioe.2021.807883

FIGURE 9.

FIGURE 9

Typical Safranin O–fast green (S–O) staining in the tail discs at 0 (A), 4 (B), 8 (C), and 12 (D) weeks after injection. Scale bar = 500 μm.