Methotrexate With or Without Cyclophosphamide in Treating Patients With Lymphocytic Leukemia
Eastern Cooperative Oncology Group
Eastern Cooperative Oncology Group
Barbara Ann Karmanos Cancer Institute
Fred Hutchinson Cancer Center
M.D. Anderson Cancer Center
National Cancer Institute (NCI)
German CLL Study Group
National Institutes of Health Clinical Center (CC)
National Cancer Institute (NCI)