Correction to: Prognostic impact of gross tumor volume during radical radiochemotherapy of locally advanced non-small cell lung cancer-results from the NCT03055715 multicenter cohort study of the Young DEGRO Trial Group - Ostheimer, Christian; Mäurer, M.; Ebert, Nadja; Schmitt, Daniela; Krug, David; Baumann, René; Henkenberens, Christoph; Giordano, Frank Anton; Sautter, Lisa; López, Guerra; Fleischmann, Daniel F.; Niyazi, M.; et al. (Strahlentherapie und Onkologie, 2021)