1. Department of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, P.R. China
2. Institute of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, P.R. China
3. Department of Thoracic Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, P.R. China