Affiliation: | 1. Department of Thoracic Cardiovascular Surgery of Tongji Hospital of Tongji University, Shanghai, P.R.China. 389 Xincun Rd., Shanghai, 200065, P.R. China.;2. Department of Cardiovascular Surgery of Zhongshan Hospital of Fudan University, Shanghai. 180 Fenglin Rd., Shanghai, 200032, P.R.China. |