STAT3 and ovarian carcinoma: Of specific interest, DDR1 is a collagen-activated receptor tyrosine kinase highly expressed in all histological subtypes of epithelial ovarian cancer compared with the normal ovarian surface epithelium [42] and has been ascribed a role in the JAK2/STAT3 pathway in sustaining pluripotency factors and self-renewal capabilities of metastatic CSC [43].