tokens: Endothelial cell activation and leukocyte infiltration are a consistent feature of discordant xenograft rejection .
folded_tokens: endothelial cell activation and leukocyte infiltration are a consistent feature of discordant xenograft rejection .
labels: B-other_name I-other_name I-other_name O B-other_name I-other_name O O O O O B-other_name I-other_name I-other_name O