Up-front centralized data review and individualized treatment proposals in a multicenter pediatric Hodgkin’s disease trial with 71 participating hospitals: the experience of the German-Austrian pediatric multicenter trial DAL-HD-90 - Dieckmann, K; Potter, R; Wagner, W; Prott, F J; Hornig-Franz, I; Rath, B (Radiother Oncol, 2002)