Responses to subsequent anti-HER2 therapy after treatment with trastuzumab-DM1 in women with HER2-positive metastatic breast cancer. - Olson, E. M.; Lin, N. U.; DiPiro, P. J.; Najita, J. S.; Krop, I. E.; Winer, E. P.; Burstein, H. J. (Annals of Oncology, 2012)