Fibroblast-mediated KRAS activation in double-negative prostate cancer. - Kamijima T; Izumi K; Hiratsuka K; Inaba T; Koketsu Y; Nakagawa R; Toriumi R; Aoyama S; Kano H; Makino T; Naito R; Kadomoto S; et al. (Cell death & disease, 2026)