Patients who undergo ASCT are followed at months 1, 3, 7, 13, 19, and 25 and then annually thereafter. Patients who complete salvage therapy, but do not undergo ASCT are followed at months 4, 8, 14, 20, and 26 and then annually thereafter. Patients who relapse or progress are followed every 6 months until 25 months from ASCT or 26 months from completion of salvage therapy and then annually thereafter.