1. Department of Otolaryngology and Head Neck SurgeryChinese PLA General Hospital Beijing China
2. Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing CityChinese PLA Medical School Beijing China
3. Department of RadiologyChinese PLA General Hospital Beijing China
4. Department of Surgical Sciences, Section of Otolaryngology Head and Neck SurgeryUppsala University Hospital Uppsala Sweden
5. Department of OtolaryngologyUppsala University Hospital Uppsala Sweden