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. 2018 Nov 20;10:385. doi: 10.3389/fnagi.2018.00385

FIGURE 1.

FIGURE 1

Experimental timeline. Mice were injected subcutaneously with 20 μg/kg (low-dose group) and 200 μg/kg (high-dose group) recombinant human insulin-like growth factor-1 (rhIGF-1) or saline three times a week from days 0 to 53. Subsequently, the olfactory epithelium was collected for analysis by immunohistochemistry (IHC).