KLK6 and ovarian serous adenocarcinoma: Therefore, it is not too surprising that we observed indication for coordinate expression of some KLKs such as KLK6/KLK8 (Spearman correlation of mRNA levels: rs = 0.636; [25]), KLK10/KLK11 (rs = 0.647; [26]), or KLK5/KLK7 (rs = 0.568; unpublished results) in advanced high-grade serous ovarian cancer.