1 Department of Radiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China.
2 Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China.
3 Department of Emergency, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China.
4 Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China.
5 Department of Respiratory and Critical Care Medicine, Zhoukou Central Hospital, Zhoukou, Henan 466000, China.
6 Department of Respiratory and Critical Care Medicine, Affiliated Hospital of Jilin Medical University, Jilin, Jilin 132013, China.
7 Department of Respiratory Medicine, Taiyuan Municipal No.2 People's Hospital, Taiyuan, Shanxi 030002, China.
8 Department of Respiratory and Critical Care Medicine, Ordos Central Hospital, Ordos School of Clinical Medicine, Inner Mongolia Medical University, Ordos, Inner Mongolia 017000, China.