1. Endoscopic Center of Nanjing Chest Hospital; Nanjing Jiangsu China
2. Clinical Center of Nanjing Respiratory Diseases and Imaging; Nanjing Jiangsu China
3. Department of Respiratory Medicine; Nanjing Chest Hospital; Nanjing Jiangsu China
4. Department of Respiratory Medicine; Affiliated Jiangning Hospital of Nanjing Medical University; Nanjing Jiangsu China