1. Central and Clinical Laboratory of Sanya People’s Hospital, Sanya, Hainan572000, People’s Republic of China
2. Guizhou Provincial Center for Disease Control and Prevention, Laboratory of Bacterial Infectious Disease of Experimental Center, Guiyang550004, P. R. China
3. Department of Otolaryngology, Head and Neck Surgery, Children’s Hospital Capital Institute of Pediatrics, Beijing100020, P. R. China
4. Experimental Research Center, Capital Institute of Pediatrics, Beijing100020, P. R. China