Expression of IL-8 and vWf in resting HIMEC. Two-color immunofluorescence staining for IL-8 (a, c, and e) and vWf (b, d, and e) on monolayer culture. Red, IL-8 staining; green, vWf staining; yellow, colocalized IL-8 and vWf staining. Scale bars, 10 μm.