1 Department of Otorhinolaryngology, Hebei General Hospital, Shijiazhuang City, Hebei Province, PR China.
2 Department of Otorhinolaryngology, 980 (Bethune International Peace) Hospital of PLA Joint Logistics Support Forces, Shijiazhuang City, Hebei Province, China. Electronic address: 183767057@qq.com.
3 Department of Otorhinolaryngology, 980 (Bethune International Peace) Hospital of PLA Joint Logistics Support Forces, Shijiazhuang City, Hebei Province, China.