1. The Second Affiliated Hospital of Xi’an Jiaotong University, Department of Otolaryngology Head and Neck Surgery, Xi’an, China
2. The Second Clinical Medical College of Lanzhou University, Lanzhou, China
3. The Second Affiliated Hospital of Xi’an Jiaotong University, Nursing Department, Xi’an, China
4. The Second Clinical Medical College of Xi’an Jiaotong University, Xi’an, China