1. Department of Cardiology, the Second Hospital of Shandong University, Jinan 250000, P. R. China
2. Department of Transfusion Medicine, Wuhan Hospital of Traditional Chinese and Western Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, P. R. China
3. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China