1. Department of Thoracic Surgery First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi China
2. Department of Vascular and Endovascular Surgery First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi China
3. Department of Otorhinolaryngology First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi China