Borchmann P, Plütschow A, Kobe C, Greil R, Meissner J, Topp MS, Ostermann H, Dierlamm J, Mohm J, Thiemer J, et al. PET-guided omission of radiotherapy in early-stage unfavourable Hodgkin lymphoma (GHSG HD17): a multicentre, open-label, randomised, phase 3 trial. Lancet Oncol. 2021;22(2):223-234.