Yu Lei, Shi Enyi, Gu Tianxiang
Department of Cardiac Surgery, First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China.
J Thorac Cardiovasc Surg. 2011 Oct;142(4):937-9. doi: 10.1016/j.jtcvs.2011.05.020. Epub 2011 Jul 2.