1. Institute of Oncology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, P.R. China
2. Department of Thoracic Surgery, The Second Hospital of Shandong University, Jinan, Shandong, P.R. China
3. Department of Respiratory, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, P.R. China
4. Department of Thoracic Surgery, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, P.R. China