Transforming growth factor-β decreases the cancer-initiating cell population within diffuse-type gastric carcinoma cells. - Ehata, S; Johansson, E; Katayama, R; Koike, S; Watanabe, A; Hoshino, Y; Katsuno, Y; Komuro, A; Koinuma, D; Kano, M R; Yashiro, M; Hirakawa, K; et al. (Oncogene, 2011)