Analysis of PIK3CA Mutations and Activation Pathways in Triple Negative Breast Cancer. - Cossu-Rocca P; Orrù S; Muroni MR; Sanges F; Sotgiu G; Ena S; Pira G; Murgia L; Manca A; Uras MG; Sarobba MG; Urru S; et al. (PloS one, 2015)