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Survival of vaccinated mice after subcutaneous challenge with RM-9 cells. Mice were vaccinated with 1 × 106 γ-irradiated cells or PBS. Vaccines were administered once a week for three consecutive weeks, followed by a challenge of RM-9 cells in the fourth week. Tumor size was measured in time and survival determined (* P < 0.05 compared to the RM-9 vaccinated group)
