KRAS and DAXX/ATRX gene mutations are correlated with the clinicopathological features, advanced diseases, and poor prognosis in Chinese patients with pancreatic neuroendocrine tumors - Yuan, F; Shi, M; Ji, J; Shi, H; Zhou, C; Yu, Y; Liu, B; Zhu, Z; Zhang, J (Int J Biol Sci, 2014)