To Compare the Efficacy of a Prophylactic Use of Tenofovir by Duration for the Non-Hodgkin's Lymphoma

This study will be conducted in a randomized, open-label, multi-center design. On Day 1 of chemotherapy, approximately 90 subjects screened and determined eligible will be randomized to either Group A or Group B in a 1:1 manner for study participation. * Group A: Upon the EOC, subjects will receive tenofovir 300mg for approximately 6 months (24 weeks) and undergo treatment and follow-up every 12 weeks for up to 72 weeks post chemotherapy. * Group A: Upon the EOC, subjects will receive tenofovir 300mg for approximately 12 months (48 weeks) and undergo treatment and follow-up every 12 weeks for up to 72 weeks post chemotherapy.