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Dependence of the mean squared error on the number of epochs for four transfer networks in four schemes (A, B, C and D) from one of the random sampling experiments. Within each scheme the training and test curves are shown for 5%, 40% and 100% of the training sample sizes. For B and C, 100% mammography data were used in the stage 1 pre-training. The DBT test set was used for testing of all four schemes and conditions.
