1. Department of Cardiovascular Surgery of the First Affiliated Hospital and Institute for Cardiovascular Science, Suzhou Medical College of Soochow University, Soochow University, Suzhou 215007, P. R. China
2. Department of Cardiovascular Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, P. R. China
3. State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China