Wu, G., Wang, S., Cheng, M., Peng, B., Liang, J., Huang, H., Jiang, X., Zhang, L., Yang, B., Cha, Y., Jiang, H., & Huang, C. (2016). The serum matrix metalloproteinase-9 level is an independent predictor of recurrence after ablation of persistent atrial fibrillation . Clinics, 71(5), 251-256. https://doi.org/10.6061/clinics/2016(05)02