Wu, Gang, Shun Wang, Mian Cheng, Bin Peng, Jingjun Liang, He Huang, Xuejun Jiang, Lizhi Zhang, Bo Yang, Yongmei Cha, Hong Jiang, and Congxin Huang. 2016. “ The Serum Matrix Metalloproteinase-9 Level Is an Independent Predictor of Recurrence After Ablation of Persistent Atrial Fibrillation ”. Clinics 71 (5):251-56. https://doi.org/10.6061/clinics/2016(05)02.