ESR1 and cancer: We found that high expression level of miR-30a was significantly associated with better survival in patients with stage II and IV cancer (p = 0.043 and 0.0053, respectively), and ER positive and non-triple negative subtypes (Log rank test, p = 0.0172, p = 0.0001, and p = 0.0168, respectively) (Fig. 4).