Affiliations:
1 Second Clinical Medicine College, Binzhou Medical
University, Yantai, Shandong 264003, People’s Republic of China
2 Department of Otorhinolaryngology, Head and Neck
Surgery, Yantai Yuhuangding Hospital, Qingdao University, Yantai,
Shandong 264000, People’s Republic of China
3 Shandong Provincial Clinical Research Center for
Otorhinolaryngologic Diseases, Yantai, Shandong 264000, People’s
Republic of China
4 School of Clinical Medicine, Weifang Medical
University, Weifang, 261042, China.