Ikarashi S, Nishikura K, Ajioka Y, Aoyagi Y. Re-evaluation of phenotypic expression in undifferentiated-type early gastric adenocarcinomas using mucin core protein and CDX2. Gastric Cancer. 2013 Apr;16(2):208–19. doi: 10.1007/s10120-012-0172-3. PMID: 22829163.