<qa>  What is the name of the arm A combination?When this study began, participants were randomly assigned as in the flip of a coin to 1 of 2 arms: Arm A R-HCVAD alternating with a combination of rituximab, methotrexate, and Ara-C or Arm B R-CHOP. From this point on, all new participants will be treated with the Arm A combination, which has shown to be better. 