PERSISTENT MEDIASTINAL POSITRON EMISSION TOMOGRAPHY (PET)‐POSITIVITY AFTER FRONTLINE THERAPY FOR HODGKIN LYMPHOMA IS BEST MANAGED BY CLOSE OBSERVATION. (12th June 2019) - Novo, M.; Nowakowski, G.S.; Habermann, T.M.; Witzig, T.E.; Micallef, I.N.; Johnston, P.B.; Inwards, D.J.; Ristow, K.; Young, J.R.; Ansell, S.M.