 Quality of life is assessed by the self-reported Functional Assessment of Cancer Therapy-Brain questionnaire at initial leukapheresis, at the first vaccination, after the third vaccination at the time of post-vaccine leukapheresis, and then with every even-numbered vaccination thereafter. A neuropsychological assessment is also conducted prior to the first vaccine and then with every second vaccination thereafter in order to monitor for any changes in neurocognitive or affective changes. 