CXCR4 and acute myeloid leukemia: In 63 AML patients, the median proportion of CD34+CD38− leukemic blasts was 1.3%. Among CD34+CD38− cells, 74.6% expressed CD123, 100% expressed CD44, and 85.7% expressed CD184. Patients who achieved complete remission had significantly lower LSC proportions compared to those who did not achieve remission