 At the time of progression, patients receive a final intradermal vaccination comprising 111In-labeled CMV-DCs at the base of the jaw bilaterally and to the inguinal region, as a control. Gamma camera images are then taken at 24 and 48 hours after the vaccination to compare DC migration in the groin to each side of the neck injection sites and to observe migration from the neck injection sites to the deep and superficial cervical lymph nodes. 