7. Use of any of the following within 90 days prior to screening: immunomodulatory, cytokine, or growth stimulating factors such as systemic cytotoxic chemotherapy, systemic corticosteroids, immune globulin, interferon, cyclosporine, methotrexate, azathioprine, anti-CD25 antibody, IFN, interleukins, interleukin-2 (IL-2), hydroxyurea, thalidomide, sargramostim (granulocyte macrophage-colony stimulating factor [GM-CSF]), growth factors, dinitrochlorobenzene (DNCB), thymosin alpha, thymopentin, inosiplex, polyribonucleoside, or diticarb sodium, coumadin, warfarin, or other Coumadin derivative anticoagulants.