Ebert, M. P. A., Yu, J., Hoffmann, J., Rocco, A., Röcken, C., Kahmann, S., et al. (2003). Loss of beta-catenin expression in metastatic gastric cancer. Journal of Clinical Oncology, 21(9): 1, pp. 1708-1714. Retrieved from http://www.jco.org/cgi/content/abstract/21/9/1708.