1. Fuwai Hospital and Cardiovascular Institute, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, Peoples Republic of China
2. Department of Cardiopulmonary Bypass, Fuwai Hospital and Cardiovascular Institute, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, Peoples Republic of China
3. Department of Cardiopulmonary Bypass, Fuwai Hospital and Cardiovascular Institute, Chinese Academy of Medical Science, Peking Union Medical College, Beijing, Peoples Republic of China,