Cell line ER, PR, HER2/Neu/ERBB2 status, PIK3CA mutational status, PTEN mutational status, other documented mutations, and inhibitor GI50s observed (pan PI3Ki: GDC-0941, PI3K-αi: BYL719, PI3K-βi: AZD6482). Abbreviations: pos = positive, neg = negative, wt = wild type, mut = mutation, del = deletion, amp = amplification, missense = missense mutation, TP53 = Tumor protein p53, CDKN2A = Cyclin-dependent kinase inhibitor 2A, HDM2 = Human double minute 2 homolog, RB1 = Retinoblastoma protein, Smad4 = Mothers against decapentaplegic homolog 4 and EGFR = Epidermal growth factor receptor.