EPO and acute myeloid leukemia: Myeloid cytokine levels were highly variable in AML conditioned media but were systematically lower than BM plasma levels for TPO (mean 62.2 ± 61.1 versus 1128.2 ± 1012.9 pg/mL, q = 0.001) and EPO (mean 29.9 ± 7.9 versus 2852.0 ± 4506.0 pg/mL, q < 0.001, Fig. 3B, Supplementary Table 6).