Patients with classical Hodgkin lymphoma (CHL) and treatment failure despite a negative iPET have poor outcomes as patients with positive iPET and treatment escalation. (June 2017) - Zaucha, J.M.; Khair, W.; Biecek, P.; Subocz, E.; Tajer, J.; Kulikowski, W.; Panebianco, M.; Grad, J.; Rybka, J.; Kroll‐Balcerzak, R.; Romanowicz, A.; Chmielowska, E.; et al.