Overview Study of ONTAK in Patients With B-Cell Chronic Lymphocytic Leukemia (CLL) Status: Completed Trial end date: 2006-05-01 Target enrollment: Participant gender: Summary The purpose of this study is to evaluate the safety and effectiveness of ONTAK in previously treated patients with chronic lymphocytic leukemia (CLL) Phase: Phase 2 Details Lead Sponsor: Eisai Inc.Treatments: Denileukin diftitox