SNAI1 and ovarian carcinoma: The metastasis of ovarian cancer migration is promoted by BACH1 through its recruitment of high‐mobility group AT‐hook protein 2 (HMGA2) and binding to the promoters of EMT‐related genes, such as snail family transcriptional repressor 1 (SNAIL) and snail family transcriptional repressor 2 (SLUG).