1. Department of Otorhinolaryngology - Head and Neck Surgery, Second Affiliated Hospital, Xi’an Jiaotong University School of Medicine, Xi’an, People’s Republic of China;
2. Department of Otorhinolaryngology, Head and Neck Surgery, Second Affiliated Hospital, Xi’an Jiaotong University School of Medicine, Xi’an, People’s Republic of China;
3. Department of Dermatology, Second Affiliated Hospital, Xi’an Jiaotong University School of Medicine, Xi’an, People’s Republic of China;
4. Department of Neurotology and Audiology, Karolinska University Hospital, Stockholm, Sweden