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Leukocyte infiltration process. (1) Leukocytes roll along the vascular endothelium. (2) Leukocytes are recognized and initially bind to the blood vessel walls. (3) Leukocyte activation and leukocyte-endothelial cell adhesion. (4) Leukocytes travel through the vascular wall. (5) Leukocytes transmigrate into the ischemic region.
