Gao M, Zhang K, Li S, Guo H, Sun Y, Kong J, Han T, Chang Y, Huang X, Zhao X. Single-cell RNA sequencing reveals heterogeneity of mucosaassociated invariant T cells in donor grafts and its diagnostic relevance in gastrointestinal graft-versus-host disease. Haematologica 2026; 111(1):230-244; https://doi.org/10.3324/haematol.2024.287114.