Prognostic role of PIK3CA mutational status in cell free DNA (cfDNA) from HER2-positive metastatic breast cancer patients. (March 2017) - Lee, K.-H.; Lim, J.; Min, A.; Kim, S.-G.; Kim, J.-E.; Kim, T.-Y.; Han, S.-W.; Oh, D.-Y.; Kim, T.-Y.; Im, S.-A.