PIK3R1 and cancer: We confirmed TP53 (q< 0.01) as a significantly mutated gene (SMG) for all 3 cancer types; PIK3CA (q<10-11) as SMG for CC and EC; KRAS (q < 0.1) as SMG for EC and OC; PTEN, PIK3R1, and ARID1A (q<10-3) as SMGs for EC.