Inclusion Criteria:

          -  Patients must have undergone autologous stem cell transplantation, within 18 months of
             initiation of induction therapy for newly diagnosed myeloma

          -  Time to initiation of maintenance therapy: patients may start maintenance therapy as
             early as 60 days post-transplant and up to 210 days post-transplant; as long as they
             meet the following criteria:

          -  Platelet count >= 100,000/mm^3

          -  Neutrophil count >= 1000/mm^3 (no growth factors within 5 days)

          -  Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) =< 3 x ULN

          -  Creatinine < 2.5 mg/dl

          -  Recovered (i.e., =< grade 1 toxicity) from the reversible effects of autologous stem
             cell transplant

          -  Patients whose primary therapy was changed due to suboptimal response or toxicity will
             be eligible, however no more than 2 regimens will be allowed prior to ASCT

          -  Patients must have an Eastern Cooperative Oncology Group (ECOG) status of 0 to 2

          -  Voluntary written informed consent before performance of any study-related procedure
             not part of normal medical care, with the understanding that consent may be withdrawn
             by the subject at any time without prejudice to future medical care

          -  Female patients who: are postmenopausal for at least 24 months before the screening
             visit, OR; are surgically sterile, OR; if they are of childbearing potential, agree to
             practice 2 effective methods of contraception, at the same time, 28 days prior to
             starting study drug, during study treatment and for 28 days after the last dose of
             study treatment, OR agree to completely abstain from heterosexual intercourse; male
             patients, even if surgically sterilized (i.e., status post vasectomy), who: agree to
             practice effective barrier contraception during the entire study treatment period and
             through 28 days after the last dose of study treatment, OR; agree to completely
             abstain from heterosexual intercourse

        Exclusion Criteria:

          -  Major surgery within 14 days before the first dose of study drug

          -  Radiotherapy within 14 days before enrollment

          -  Known active central nervous system involvement

          -  Inability to swallow oral medication, inability or unwillingness to comply with the
             drug administration requirements, or gastrointestinal (GI) procedure that could
             interfere with the oral absorption or tolerance of treatment

          -  Female subject is pregnant or lactating

          -  Known active hepatitis B virus hepatitis, or known active hepatitis C virus

          -  Infection requiring systemic IV antibiotic therapy within 7 days before cycle 1 day 1
             of therapy

          -  Known allergy to any of the study medications, their analogues, or excipients in the
             various formulations

          -  Failure to have fully recovered (i.e., =< grade 1 toxicity) from the effects of prior
             chemotherapy regardless of the interval since last treatment

          -  Co-morbid systemic illnesses or other severe concurrent disease that, in the judgment
             of the investigator, would make the patient inappropriate for entry into this study or
             interfere significantly with the proper assessment of safety and toxicity of the
             prescribed regimens