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. 2019 Dec 17;14:9917–9928. doi: 10.2147/IJN.S226466

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© 2019 Li et al.

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Hematoxylin and eosin-stained sections of muscle and skin from injection sites at days 1, 3, and 7 after inoculation. Mice were inoculated by injecting 800 µg of 311 nm zein particles into the left leg at day 0 via intramuscular or subcutaneous routes. Inflammatory cell infiltration (hollow arrows) and damaged muscle fiber (hollow stars) were located in the muscle tissues and dermis. a, stratum; b, epidermis; c, dermis; d, sebaceous glands; e, hair follicles containing hair fibers (bright color).