1. Department of Respiratory Endoscopy and
2. Department of Respiratory and Critical Care Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China;
3. Shanghai Engineering Research Center of Respiratory Endoscopy, Shanghai, China;
4. Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, China; and
5. Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Air Force Medical University, Xi’an, China