IL1RL1 and acute myeloid leukemia: We then measured the frequencies of IL1RL1+ LSCs cells in BM samples between AML complete responders (CR) vs. nonresponders (NR) (characteristics in Supplementary Table 1, gating strategy in Supplementary Fig. 2A) showing that IL1RL1+ LSCs following chemotherapy induction were increased in NR as compared to patients in CR (Supplementary Fig. 1D).