Finally, we were able to show that JQ1 and dBET6 dose‐dependently suppress the growth of primary MPN cells (Figure S10) and the same effect was observed with JQ1 and dBET6 in the MPN‐related cell lines HEL, SET‐2, and UT‐7 cells carrying CALR mutations (Figure S11). The gene discussed is CALR; the disease is myeloproliferative disorder.