27. The following therapies cannot be administered while patients are undergoing treatment on this protocol: i) radiation therapy; ii) chemotherapy; iii) corticosteroids (except for very short courses of topical or inhaled); iv) agents used to treat attention deficit and hyperactivity disorder (ADHD); v) rifampicin or phenytoin; vi) other protein, particle or cell vaccine immunomodulation therapies. If these therapies are essential for treatment of other conditions, participation in this study will be terminated.