1. Department of Cardiovascular Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
2. Key Laboratories of Myocardial Ischemia, Chinese Ministry of Education, Harbin, China.
3. Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Canada.
4. Division of Cardiac Surgery, Department of Surgery, University of Toronto, Toronto, Canada.