1 Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China Department of Otorhinolaryngology Head and Neck Surgery, the Fourth hospital of Harbin, Harbin 150020, China.
2 Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China.