CXCL12 and acute myeloid leukemia: Our results showed that the concentration of CXCL12 in BMT transplanted AML patients having a history of three, six and nine times of platelet transfusion, (before BMT) was, 1231±287 pg/mL, 1463.03±309.7 pg/mL and 2249.16±191.02 pg/ml, respectively.