1 Inner Mongolia Medical University, Department of Otorhinolaryngology, Head and Neck Surgery, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot North Street, Inner Mongolia, 010050, China.
2 Inner Mongolia Medical University, Department of Otorhinolaryngology, Head and Neck Surgery, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot North Street, Inner Mongolia, 010050, China. Electronic address: nyfyyunfei@163.com.