Freitas-Junior, R.; Lemos, N. A. de F.; Moreira, M. A. R.; Silva, T. C.; Oliveira, J. C. de; Silva, C. M. B. e. DIFFICULTIES IN COLLECTING DATA ON DUCTAL CARCINOMA IN SITU AT A POPULATION-BASED CANCER REGISTRY. MAST 2019, 29, 86-89.