Combination Chemotherapy With or Without Rituximab in Treating Patients With Relapsed Non-Hodgkin's Lymphoma
European Organisation for Research and Treatment of Cancer - EORTC
European Organisation for Research and Treatment of Cancer - EORTC
SWOG Cancer Research Network
Canadian Cancer Trials Group
SWOG Cancer Research Network
European Organisation for Research and Treatment of Cancer - EORTC
European Organisation for Research and Treatment of Cancer - EORTC