However, since the half-life of ATG is as long as 30 days and is detected even up to 5 weeks after HSCT, it is thought that the ATG schedule has little effect on GVHD.[21,22] In the ATG group of our study, 3 patients underwent 1 or 2 allele mismatched unrelated donor transplantation of 10 HLAs, but these patients were inconsistent with HLA-DRB1∗11:01–11:04 and HLA-DQB1∗03:01–03:02 or HLA-C∗03:03–03:04 alleles. The gene discussed is HLA-S; the disease is graft versus host disease.