This publication has been retracted by the Editor due to concerns regarding the originality of the figure images. Reference: Xin Wang, Rong Zhao, Honggang Zhang, Min Zhou, Ming Zhang, Tong Qiao. Levo-Tetrahydropalmatine Attenuates Progression of Abdominal Aortic Aneurysm in an Elastase Perfusion Rat Model via Suppression of Matrix Metalloproteinase and Monocyte Chemotactic Protein-1. Med Sci Monit, 2018; 24: 625-660. DOI: 10.12659/MSM.906153.