KLK7 and atopic eczema: The expression level of kallikrein-related peptidase 7 (KLK7), an atopic dermatitis-associated serine protease [27], was elevated approximately 8-fold in the LBE group (61,577 ± 1080/2 × 107 pixels) compared to that of the control group (6771 ± 399/2 × 107 pixels).