1. Department of Peripheral Vascular, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China
2. Department of Cardiology, The First Hospital of Xi’an, Xi’an 710002, China
3. Cadre Ward of the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, China
4. Institute of Medical Engineering, Medical School of Xi’an Jiaotong University, Xi’an 710061, China
5. Department of Thoracic Surgery, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, China