- 1,1-Dichloro-2,2-bis(p-chlorophenyl)ethylene and polychlorinated biphenyls and breast cancer: combined analysis of five U.S. studies. Laden, F., Collman, G., Iwamoto, K., Alberg, A.J., Berkowitz, G.S., Freudenheim, J.L., Hankinson, S.E., Helzlsouer, K.J., Holford, T.R., Huang, H.Y., Moysich, K.B., Tessari, J.D., Wolff, M.S., Zheng, T., Hunter, D.J. J. Natl. Cancer Inst. (2001)