1. Endoscopic Center of Nanjing Chest Hospital, Nanjing, Jiangsu 210029, China
2. Clinical Center of Nanjing Respiratory Diseases and Imaging, Nanjing, Jiangsu 210029, China
3. Department of Respiratory Medicine, Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu 211100, China
4. MOE Key Laboratory, Model Animal Research Center, Nanjing University, Nanjing, Jiangsu 210061, China
5. Department of Respiratory Medicine, Nanjing Pukou Central Hospital, Nanjing, Jiangsu 211800, China