1. The Second Clinical Medical School, Shaanxi University of Chinese Medicine, Xianyang Shaanxi, China
2. The Department of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an Shaanxi, China
3. Department of Biophysics, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an Shaanxi, China