qRT–PCR data confirmed that the mRNA levels of interleukin 1-α (IL1A) and interleukin 1-β (IL1B) were increased significantly in GSK591-treated decidualized hEnSCs (Fig. 6G), which was also observed in the endometrium of endometriosis patients (Supplementary Fig. 2). The gene discussed is IL1A; the disease is endometriosis.