[1] Univ Klinikum Essen, Zentrum Klin Epidemiol, Essen, Germany
[2] Univ Klinikum Essen, Inst Med Informat Biometrie & Epidemiol, Essen, Germany
[3] Boston Univ, Dept Epidemiol, Sch Publ Hlth, Boston, MA 02215 USA
[4] DKTK, Essen, Germany
[5] Univ Klinikum Essen, Innere Klin Tumorforsch, Westdeutsch Tumorzentrum, Essen, Germany
[6] Univ Klinikum Essen, Ruhrlandklin, Abt Thorakale Onkol, Essen, Germany
[7] Univ Klinikum Essen, Ruhrlandklin, Abt Intervent Pneumol, Essen, Germany
[8] Univ Klinikum Essen, Inst Diagnost & Intervent Radiol & Neuroradiol, Essen, Germany