Abbreviations: WBC, white blood cell; Lym, lymphocyte; Hb, hemoglobin; Plt, platelet; CHOP, cyclophosphamide, doxorubicin, vincristine, prednisone; CVP, cylophosphamide, vincristine, prednisone, Chlor, chlorambucil; FCR, fludarabine, cyclophosphamide, rituximab; ; FC, fludarabine, cyclophosphamide; FR, fludarabine, rituximab; BR, bendamustine, rituximab; PDN, prednisolone; CR, complete remission; NA; not available, N normal; PDN prednisone; RT, radiotherapy; VAD (Vincristine, Adriamycin, Dexametasone).