- p53 gene expression in node-positive breast cancer: relationship to DNA ploidy and prognosis. Cunningham, J.M., Ingle, J.N., Jung, S.H., Cha, S.S., Wold, L.E., Farr, G., Witzig, T.E., Krook, J.E., Wieand, H.S., Kovach, J.S. J. Natl. Cancer Inst. (1994)