1. Department of Otolaryngology, Head and Neck Surgery, People’s Hospital, Peking University, Beijing, China
2. Department of Human Anatomy, Histology & Embryology, School of Basic Medical Sciences, Peking University, Beijing, China
3. Department of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden
4. Department of Otolaryngology, Head and Neck Surgery & Audiology and Neurotology, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden