1. Department of Otorhinolaryngology, Medical School of Xi’an Jiaotong University, Xi’an, Shaanxi, China (mainland)
2. Department of Otorhinolaryngology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi, China (mainland)
3. Department of Otolaryngology-Head and Neck Surgery, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China (mainland)