Pentostatin and Rituximab in Treating Patients With Low-Grade Non-Hodgkin's Lymphoma or Chronic Lymphocytic Leukemia

North Shore Hematology/Oncology Associates, P.C., East Setauket

Hematology Oncology Associates of Central New York, P.C., Syracuse

Oncology-Hematology Associates, P.A., Clinton

Cancer and Blood Institute of the Desert, Rancho Mirage

Redding Medical Center, Redding