Frequent alteration of XAF1 in human colorectal cancers: Implication for tumor cell resistance to apoptotic stresses - Chung, S K; Lee, M G; Ryu, B K; Lee, J H; Han, J; Byun, D S; Chae, K S; Lee, K Y; Jang, J Y; Kim, H J; Chi, S G (Gastroenterology, 2007)