1. Department of Otolaryngology, Chengyang District People’s Hospital, Qingdao, Shandong Province, China
2. Department of Paediatrics, Chengyang District People’s Hospital, Qingdao, Shandong Province, China
3. Department of Infectious Diseases, Chengyang District People’s Hospital, Qingdao, Shandong Province, China
4. Department of Thoracic Surgery, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China.