Alpízar-Alpízar, W., R. Sierra, P. Cuenca, C. Une, F. Mena, and G. I. Pérez-Pérez. “Association of the P53 Codon 72 Polymorphism to Gastric Cancer Risk in a Hight Risk Population of Costa Rica”. Revista De Biología Tropical, Vol. 53, no. 3-4, Apr. 2014, pp. 317-24, doi:10.15517/rbt.v53i3-4.14406.