- Subjects must not have been treated previously with any systemic therapy for multiple myeloma. Prior treatment with corticosteroids or radiation therapy does not disqualify the subject (the maximum dose of corticosteroids should not exceed the equivalent of 160 mg of dexamethasone in a 2-week period). Two weeks must have elapsed since the date of the last radiotherapy treatment. Enrollment of subjects who require concurrent radiotherapy (which must be localized in its field size) should be deferred until the radiotherapy is completed and 2 weeks have elapsed since the last date of therapy.