Combination Chemotherapy and Rituximab in Treating Patients With Chronic Lymphocytic Leukemia (CLL) That Did Not Respond to Fludarabine, CLL With Autoimmune Haemolytic Anemia (AIHA) or Richter's Transformation (RT)
German CLL Study Group
German CLL Study Group
Barbara Ann Karmanos Cancer Institute
SWOG Cancer Research Network
National Cancer Institute (NCI)
Swiss Cancer Institute
National Institutes of Health Clinical Center (CC)