CXCL12 and acute myeloid leukemia: The results showed that PB Tregs from AML patients had stronger migration to all three media than normal Tregs (SDF-1α: 27.69 ± 1.84% vs. 11.73 ± 0.27%, P = 0.0010; normal BM: 12.20 ± 0.55% vs. 7.37 ± 0.75%, P = 0.0007; AML BM: 13.73 ± 0.47% vs. 7.67 ± 0.67%, P = 0.0018, respectively).