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In vivo THG images of leukocyte infiltration in an ICR mouse at (a) 10hours, (b) 36hours, and (c) 60hours post-LPS challenge in ear pinna. Neutrophils (N) and lymphoid cells (L) can be identified in the microenvironment of an immune response. THG signals around leukocytes were generated from collagen, which serves as an in vivo reference for the normalization of THG signals from different images.
