[1] Kliniken Maria Hilf, Univ Canc Ctr Leipzig, Monchengladbach, Germany
[2] Kliniken Maria Hilf, ENT Dept, Monchengladbach, Germany
[3] Kliniken Maria Hilf, Dept Med, Monchengladbach, Germany
[4] Kliniken Maria Hilf, Dept Radiat Oncol, Monchengladbach, Germany
[5] Heidelberg Univ Hosp, Dept Thorac Oncol, Translat Lung Res Ctr Heidelberg TLRC H, Thoraxklin, Heidelberg, Germany
[6] German Ctr Lung Res DZL, Heidelberg, Germany
[7] Univ Hosp Heidelberg, Dept Palliat Med, Heidelberg, Germany
[8] Klinikum Magdeburg, Dept Hematol Oncol & Palliat Care, Magdeburg, Germany
[9] Univ Med Ctr Gottingen, Dept Palliat Med, Gottingen, Germany
[10] Kliniken Essen Mitte, Dept Med Oncol, Essen, Germany
[11] Klinikum Braunschweig, Dept Oncol & Hematol, Braunschweig, Germany
[12] Klinikum Sudstadt Rostock, Dept Gynecol, Rostock, Germany
[13] Klinikum Leverkusen, Dept Med 3, Leverkusen, Germany
[14] Univ Med Ctr Mainz, Skin Canc Ctr Rhein, Mainz, Germany
[15] Immanuel Klin & Poliklin Rudersdorf, Hematol Oncol & Palliat Care Clin, Berlin, Germany
[16] Stadt Klinikum Karlsruhe, Dept Hematol Oncol & Palliat Care, Karlsruhe, Germany
[17] Klinikum Traunstein, Dept Hematol Oncol & Palliat Care, Traunstein, Germany
[18] Univ Med Ctr Hamburg Eppendorf, Dept Oncol & Hematol, Hamburg, Germany
[19] Univ Hosp Wurzburg, Interdisciplinary Dept Palliat Med, Wurzburg, Germany
[20] Univ Regensburg, Caritas Hosp St Josef, Dept Gynecol & Obstet, Regensburg, Germany
[21] Univ Leipzig, Inst Med Informat Stat & Epidmiol, Leipzig, Germany