TPH1 and acute myeloid leukemia: Further, combination indices (CI) suggested additive to synergistic effects in Molm14 (CImax = 0.970 and 0.553, in 21% and 1%, respectively) and TPH‐1 cells (CImax = 0.903 and 0.861, in 21% and 1%, respectively), and synergistic to strong synergistic effects in a diverse panel of primary AML cells (n = 10) as summarized in Table 2.