Zheng J, Liu Y, Liu Y, Liu M, Xiang Z, Lam KT, Lewis DB, Lau YL, Tu W. Human CD8+ regulatory T cells inhibit GVHD and preserve general immunity in humanized mice. Sci Transl Med. 2013 Jan 16;5(168):168ra9. doi: 10.1126/scitranslmed.3004943. PMID: 23325802.