To inquire on that open question, we first examined HRH1 expression in blood cell subsets from healthy donors, as well as in samples from patients with AML (Table S1) and the related myeloid malignancies chronic myelomonocytic leukaemia (CMML) (Table S2) and myelodysplastic syndromes (MDS) (Table S3). The gene discussed is HRH1; the disease is acute myeloid leukemia.