CD38 and acute myeloid leukemia: The frequency of CD70+ cells in AML blasts (CD45dimSSClo), leukemic progenitor cells (CD34+CD38+) and LSCs (CD45dimSSCloCD34+CD38−) was 45.25% (23.95%-68.59%), 61.57% (28.59%-86.43%), and 30.25% (12.71%-50.50%), respectively.