[1] Univ Hosp Schleswig Holstein, Dept Radiat Oncol, Arnold Heller Str 3, D-24105 Kiel, Germany
[2] Univ Freiburg, Fac Med, Med Ctr, Dept Radiat Oncol, D-79106 Freiburg, Germany
[3] Fac Med, Dept Radiat Oncol Cyberknife & Radiotherapy, D-50937 Cologne, Germany
[4] Univ Hosp Cologne, D-50937 Cologne, Germany
[5] Univ Cologne, Ctr Mol Med Cologne, D-50931 Cologne, Germany
[6] Med Sch Hannover, Dept Radiotherapy & Special Oncol, D-30625 Hannover, Germany
[7] Jena Univ Hosp, Dept Radiotherapy & Radiat Oncol, D-07747 Jena, Germany
[8] Univ Hosp Tubingen, Dept Radiat Oncol, D-72076 Tubingen, Germany
[9] Ctr Radiotherapy & Radiat Oncol, D-28239 Bremen, Germany
[10] Univ Hosp Heidelberg, Dept Radiat Oncol, D-69120 Heidelberg, Germany
[11] Univ Hosp LMU Munich, Dept Radiat Oncol, D-81377 Munich, Germany
[12] German Ctr Lung Res DZL, Comprehens Pneumol Ctr Munich CPC M, D-81377 Munich, Germany
[13] German Canc Consortium DKTK, Partner Site Munich, D-81377 Munich, Germany
[14] Tech Univ Dresden, Fac Med, Dept Radiotherapy & Radiat Oncol, D-01307 Dresden, Germany
[15] Tech Univ Dresden, Univ Hosp Carl Gustav Carus, D-01307 Dresden, Germany
[16] Univ Hosp Hamburg Eppendorf, Dept Radiotherapy & Radiat Oncol, D-20251 Hamburg, Germany
[17] Univ Hosp Freiburg, Inst Med Biometry & Stat, D-79106 Freiburg, Germany
[18] Univ Med Ctr Leipzig, Dept Med Psychol & Med Sociol, D-04103 Leipzig, Germany
[19] Univ Hosp Leipzig, Dept Radiotherapy & Radiat Oncol, D-04103 Leipzig, Germany
[20] Canc Ctr Cent Germany, Partner Site Leipzig, D-04103 Leipzig, Germany