Figure 1

Expression of CD31 and von Willebrand factor in RA synovium. Frozen or paraffin-embedded sections were stained using antibodies against human CD31 or von Willebrand factor (vWf). Samples were then incubated with biotinylated anti-mouse or anti-goat immunoglobulin, followed by streptavidin–horseradish peroxidase. Immune complexes were detected using 3,3'-diaminobenzidine.