 Subjects in complete remission will be given Rituximab per institution guidelines, as 4 weekly doses every 6 months for a total of 3 years, or until progression of disease, or if the subject is unable to tolerate further treatment. Rituximab should begin 6 months from date of discharge - 21 days. Maintenance therapy, premedications can be changed based on clinical consideration from treating physician. Timelines for giving premedications are given per institutional guidelines. Subject may be discharged after administration of Rituximab, once stable. 