1. Division of Ear, Nose and Throat Diseases, Department of Clinical Science, Intervention and Technology, Karolinska Institutet and Department of Otolaryngology Head and Neck & Audiology and Neurotology, Karolinska University Hospital, Stockholm, Sweden
2. Department of Otolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang, China