Arm 1, vaccine alone: patients received i.d. injections of Melan-A: 26-35 (A27L) and gp100: 209-217 (210M) peptides (250 µg each) formulated in Montanide ISA-51 plus s.c. injection of 3MU IFN-α, as an adjuvant on day 1 and 8 every 21 days for a total of 5 courses (10 vaccinations). Both peptides and IFN-α were injected in close but separate sites next to local lymph nodes.