KLK4 and ovarian carcinoma: Kallikreins are a subgroup of serine proteases capable of cleaving peptide bonds in proteins, and are associated with an increased metastatic behavior and unfavorable survival in HGSOC [42] and seem to be attractive targets for ovarian cancer treatment [43]; (iv) higher soluble protein abundance in ascites and gene expression of basal cell adhesion molecule (BCAM) was also identified, a receptor for the extracellular matrix protein laminin α5 (LAMA5), known to be expressed in ovarian cancer tissues [44].