1. Department of Otorhinolaryngology-Head and Neck Surgery and Ear Institute, The Second Affiliated Hospital, Sweden
2. Dept of Otorhinolaryngology-Head and Neck Surgery, Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 710004, Xi'an City, Shaanxi Province, People's Republic of China
3. Xi'an Jiaotong University School of Medicine, and the Department of Ethics, Development, Health and Art, Education Bureau, Government of Xi'an, Sweden
4. Division of Epidemiology and Biostatistics, Department of Public Health, Sweden
5. Xi'an, and the Department of Otorhinolaryngology-Head and Neck Surgery, Zhongshan Hospital, Fudan University, Shanghai, Sweden
6. People's Republic of China, and the Departments of Clinical Science Intervention and Technology, Sweden
7. Karolinska University Hospital, Stockholm, and the Department of Otorhinolaryngology-Head and Neck Surgery, Uppsala University Hospital, Uppsala, Sweden
8. Neurotology and Audiology, Sweden
9. Otorhinolaryngology-Head and Neck Surgery, Sweden
10. Dept of Clinical Science Intervention and Technology, Karolinska University Hospital, 171 76, Stockholm, Sweden