B A R&D MAB 0983 SC AB N18 SC AB F18 R&D MAB 0983, preabsorbed SC AB N18, preabsorbed SC AB F18, preabsorbed * * * * * 0 1 2 3 tumor vessel mucosa R&D MAB 0983 Ang-2 staining intensity 0 = no staining 1 = weak staining 2 = moderate staining 3 = strong staining n = 10 tumor vessel mucosa tumor vessel mucosa SC AB N18 SC AB F18 primary Ang-2 AB only preabsorbed primary Ang-2 AB 100 m