The Editor of Chinese Medical Sciences Journal retracts the following article: Zhen Li, Zhong-gao Wang, Bian Ce, Chen Xiu, Han Bing, Gao-feng Hou, Chu Jian, and Cui Qi. Interferon Regulatory Factor-1 Exerts Inhibitory Effect on Neointimal Formation after Vascular Injury. Chin Med Sci J 2009; 24(2): 91-6. PubMed ID: 19618605. The reason was that the first author, Zhen Li, used data contained in this article without permission of Dr. Masatsugu Horiuchi, Department of Molecular Cardiovascular Biology and Pharmacology of Ehime University. The first author admitted personal responsibility for the mistake.