Kaplan Meier estimate of overall survival in patients presenting no mismatch (8/8) or one mismatch (7/8) in the GvH vector in the HEL (HLA-A, -B, -C, and -DRB1 loci) stratified according to the degree of mismatching at HLA-DRB3/4/5, DQ, and DP (LEL) loci.