1 College of Pulmonary and Critical Care Medicine, 8th Medical Center of Chinese PLA General Hospital, Beijing, People's Republic of China.
2 Department of Basic Medicine, Haihe Hospital, Tianjin University, Tianjin, People's Republic of China.
3 PICU, Faculty of Pediatrics, 7th Medical Center of Chinese PLA General Hospital, Beijing, People's Republic of China.
4 Key Research Laboratory for Infectious Disease Prevention for State Administration of Traditional Chinese Medicine, Tianjin Institute of Respiratory Diseases, Tianjin, People's Republic of China.
5 Tianjin Key Laboratory of Lung Regenerative Medicine, Tianjin, People's Republic of China.