KLK5 and triple-negative breast carcinoma: Interestingly, we found parallel expression of KLK5 and KLK7 in a triple-negative breast cancer cohort as well (rs = 0.735, p < 0.001; an additional figure file shows this in more detail [see Additional file 3], W. Gong, V. Magdolen, J. Dorn, unpublished).