1. Clinical Experimental Centre, Xi’an International Medical Centre Hospital, 777, Xitai Road, Hightech-zone, Xi’an, Shaanxi 710100, P. R. China
2. Xi'an Engineering Technology Research Center for Cardiovascular Active Peptides, P. R. China
3. Department of Cardiology, the Second Affiliated Hospital, Xi’an Medical University, Xi’an, Shaanxi 710038, P. R. China
4. Imaging Diagnosis and Treatment Centre, Xi’an International Medical Centre Hospital, 777, Xitai Road, Hightech-zone, Xi’an, Shaanxi 710100, P. R. China