MMP2 and nasopharyngeal carcinoma: Liu and M. Zheng, "Capn4 is a Marker of Poor Clinical Outcomes and Promotes Nasopharyngeal Carcinoma Metastasis via Nuclear Factor-κB-Induced Matrix Metalloproteinase 2 Expression," Cancer Science 105, no. 6 (2014): 630-638, https://doi.org/10.1111/cas.12416.