1. Department of Internal Medicine-Oncology, Carl v. Ossietzky University of Oldenburg, Oldenburg, Germany
2. Department of Hematology and Oncology, Pius-Hospital, Oldenburg, Germany
3. Lung Cancer Network NOWEL.org, Oldenburg, Germany
4. Institute of Hematopathology Hamburg, Hamburg, Germany
5. Department of Tumor Documentation, Cancer Center Oldenburg, Pius Hospital Oldenburg, Oldenburg, Germany
6. Institute of Experimental Immunology and Hepatology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
7. Division of Epidemiology and Biometry, Carl v. Ossietzky University of Oldenburg, Oldenburg, Germany