<qa>  What is lamivudine to be maintained no matter what?2.1 Arm I Patients take lamivudine 100 mg P.O. qd, starting from Day 1 of the first course of CHOP, and until 2 months after the completion of chemotherapy. Lamivudine is to be maintained no matter hepatitis occurred or not during chemotherapy. If second-line chemotherapy is used, lamivudine with the same dose and schedule will be continued until 2 months after completion of the second-line chemotherapy. 