Utility of risk prediction nomogram for lymph node metastasis in the elderly with undifferentiated early gastric cancer. Indian Journal of Experimental Biology (IJEB), [S. l.], v. 61, n. 08, p. 654–658, 2023. DOI: 10.56042/ijeb.v61i08.4376. Disponível em: https://or.niscpr.res.in/index.php/IJEB/article/view/4376. Acesso em: 13 may. 2026.