1. Resident Doctor, Department of Otolaryngology Head and Neck Surgery, First Affiliated Hospital of China Medical University, Shenyang 110001, China
2. Consultant, Professor and Chief Physician, Department of Otolaryngology Head and Neck Surgery, First Affiliated Hospital of China Medical University, Shenyang 110001, China
3. Chief Physician, Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital of Capital Medical University, Beijing 100050, China