1. Department of Radiation Oncology, The Affiliated Lihuili Hospital, Ningbo University, Ningbo, Zhejiang, China
2. Department of Otorhinolaryngology Head and Neck Surgery, The Affiliated Lihuili Hospital, Ningbo University, Ningbo, Zhejiang, China
3. Department of Thoracic Surgery, The Affiliated Hospital of Medical School of Ningbo University, Ningbo, Zhejiang, China