A phase II study of sequential combination chemotherapy with cyclophosphamide, prednisone, and 2-chlorodeoxyadenosine in previously untreated patients with chronic lymphocytic leukemia. - Tefferi A; Li CY; Reeder CB; Geyer SM; Allmer C; Levitt R; Michalak JC; Addo F; Krook JE; Witzig TE; Schaefer PL; Mailliard JA (Leukemia, 2001)