13. Continued from #12: e) Use of non-oncology vaccines containing live virus for prevention of infectious diseases within 4 weeks prior to study drug. The use of the inactivated seasonal influenza vaccine (Fluzone®) is allowed. f) Systemic corticosteroid at immunosuppressive doses (> 10 mg/day of prednisone or equivalent), must be discontinued at least 2 weeks prior to enrollment.