Whole feet were examined by IHC as described previously (11 (link)). Sections were stained with rat anti-mouse Ly6G (catalog number NMP-R14; Abcam, Cambridge, MA, USA) (neutrophils), F4/80 (Abcam) (macrophages), or CD3 (Abcam) (T lymphocytes). Detection used NovaRED secondary antibody (ImmPACT NovaRED peroxidase substrate kit [catalog number SK-4805]; Vector Laboratories, Burlingame, CA, USA). Slides were digitally scanned using an Aperio AT Turbo system (Leica Biosystems), images were analyzed using Aperio ImageScope software (Leica), and cell quantitation was undertaken using open-source image analysis software, QuPath v0.2.3 (25 (link)). Three sections per foot were analyzed to produce a mean value for each mouse.
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