7. Receipt of immunosuppressive medications within the past 6 months (e.g., oral/parenteral/inhaled corticosteroids, and/or cytotoxic medications). NOTE: The following will be allowed: corticosteroid nasal spray for allergic rhinitis; topical corticosteroids for acute, uncomplicated dermatitis; over the counter medications for acute, uncomplicated dermatitis for a period not longer than 14 days; short-acting beta-agonists in controlled asthmatics; or a short course (10 days or less) of corticosteroids for a non-chronic condition at least 2 weeks prior to enrollment in the study.