Clonal GZMK⁺CD8⁺ T Cells Are Identified as a Hallmark of the Pathogenesis of cGVHD-Induced Bronchiolitis Obliterans Syndrome after Allogeneic Hematopoietic Stem Cell Transplantation

The authors provided proof-of-principle evidence for clonal GZMK+CD8+ T cells as an unexplored contributor to the pathogenesis of cGVHD-BOS, which can be an underlying biomarker for treatment.