PTGER4 and dilated cardiomyopathy: Indeed, metformin signature also negatively correlates with the doxorubicin induced cardiotoxicity (SCC = −0.073, FDR = 4.83E‐15) and Ptger4‐/‐ model of dilated cardiomyopathy (SCC = −0.054, FDR = 4.19E‐8).