P203 Dual HER2 blockage with lapatinib and trastuzumab for Japanese patients with HER2+ breast cancer. (March 2015) - Iwata, H.; Yamamoto, N.; Masuda, N.; Bando, H.; Kuroi, K.; Ohno, S.; Kasai, H.; Morita, S.; Sakurai, T.; Toi, M.