1. Department of Otorhinolaryngology–Head and Neck Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, P.R. China
2. Department of Otorhinolaryngology–Head and Neck Surgery, The First Affiliated Hospital of Anhui University of Chinese Medicine, 117 Meishan Road, Hefei 230031, Anhui, P.R. China
3. Department of Otorhinolaryngology–Head and Neck Surgery, The First Affiliated Hospital of Anhui Medical University, 218 Jixi Road, Hefei 230022, Anhui, P.R. China