Effect of Graft-versus-Host Disease (GVHD) on Host Hematopoietic Progenitor Cells Is Mediated by Fas–Fas Ligand Interactions but This Does Not Explain the Effect of GVHD on Donor CellsTsuyoshi Iwasaki, Eizo Kakishita, Ayako Sugihara et al.|Cellular Immunology|1999Cited by 23