1. Department of Thoracic Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi, China
2. Hospital 521 of China's Ordnance Industry Group, Xi’an 710065, Shaanxi, China
3. Inner Mongolia Medical University, Hohhot 010050, Inner Mongolia, China
4. School of Continuing Education of Xi’an Jiaotong University, Xi’an 710061, Shaanxi, China
5. School of Life Sciences, Northwest University, Xi’an 710069, Shaanxi, China