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Effect of vaccination on interferon-γ production by enzyme-linked immunospot assay. Eight HLA-A2+ patients were assessed at baseline and at week 12. The y-axis represents net mean spots per 105 cells after 7 d in vitro stimulation with 10 µg/ml prostate-specific antigen peptide (50 µg total) and interleukin (IL)-2 plus IL-7. An increase from baseline activity is shown in patients 98016, 98034, and 98050.
