CD38 and acute myeloid leukemia: Conversely, expression of CLEC12A was not found on the CD34+CD38− cells in CD34‐negative AML, which is consistent with previous findings indicating that in CD34‐negative AML, the small fraction of CD34‐positive cells in most cases represents normal HSCs (van der Pol et al, 2003; Taussig et al, 2010).