Inter-observer variability in target delineation increases during adaptive treatment of head-and-neck and lung cancer. Apolle, R.; Appold, S.; Bijl, H. P.; Blanchard, P.; Bussink, J.; Faivre-Finn, C.; Khalifa, J.; Laprie, A.; Lievens, Y.; Madani, I.; Ruffier, A.; de Ruysscher, D.; van Elmpt, W.; Troost, E. G. C.. Acta Oncol. 2019; 58: p.1378-1385. doi:10.1080/0284186x.2019.1629017Article