PRELIMINARY RESULTS OF A QUALITY CONTROL STUDY ON INVOLVED NODE RADIOTHERAPY IN THE EORTC/LYSA/FIL H10 TRIAL ON STAGES I/II HODGKIN LYMPHOMA. (12th June 2019) - Aleman, B.M.; Ricardi, U.; van der Maazen, R.W.; Meijnders, P.; Beijert, M.; Boros, A.; Izar, F.; Janus, C.P.; Levis, M.; Martin, V.; Specht, L.; Corning, C.; et al.