Fludarabine With or Without Cyclophosphamide in Treating Patients With Chronic Lymphocytic Leukemia
Eastern Cooperative Oncology Group
Eastern Cooperative Oncology Group
Canadian Cancer Trials Group
Polish Lymphoma Research Group
Radiation Therapy Oncology Group
European Organisation for Research and Treatment of Cancer - EORTC
European Organisation for Research and Treatment of Cancer - EORTC
European Organisation for Research and Treatment of Cancer - EORTC