1. Department of Thoracic Surgery, Tianjin Chest Hospital, Tianjin 300222, P.R. China
2. Division of Hematology and Medical Oncology,Mayo Clinic, Scottsdale, AZ 85260, USA
3. Division of Hematology and Medical Oncology, Mayo Clinic, Scottsdale, AZ 85260, USA
4. Division of Radiation Oncology, Mayo Clinic, Scottsdale, AZ 85260, USA
5. Division of Thoracic Surgery, Mayo Clinic, Scottsdale, AZ 85260, USA
6. Division of General Thoracic Surgery, Mayo Clinic, Rochester, MN 55905, USA
7. Division of Medical Oncology, Mayo Clinic, Rochester, MN 55905, USA
8. Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN 55905, USA
9. Division of Epidemiology, Department of Quantitative Health Sciences, Mayo Clinic, Scottsdale, AZ 85260, USA