1. Jilin Key Laboratory for Immune and Targeting Research on Common Allergic Diseases, Yanbian University, Yanji, Jilin 133002, P.R. China
2. Department of Anatomy, Histology and Embryology, Yanbian University Medical College, Yanji, Jilin 133002, P.R. China
3. Department of Respiratory Medicine, Affiliated Hospital of Yanbian University, Yanji, Jilin 133000, P. R. China
4. Department of Intensive Care Unit, Affiliated Hospital of Yanbian University, Yanji, Jilin 133000, P.R. China
5. Department of Pediatrics, Affiliated Hospital of Yanbian University, Yanji, Jilin 133000, P.R. China