Figure 2  .

Immunohistochemical staining of stented arterial sections. (A) α Smooth muscle actin staining (scale bar = 100 µm): α smooth muscle actin positive cells are stained red (New Fuchsin Red), the counterstain is methyl green. All cells within the neointima, with distinctly differing spatial orientation, and media are positive for a smooth muscle actin. (B) von Willebrand Factor staining (scale bar = 50 µm): endothelium (arrowheads) of the vasa vasorum of the adventitia is stained red (New Fuchsin Red), the counterstain is methyl green.