Risk factors associated with postoperative morbidity and mortality in D2 radical gastrectomy for gastric cancer O.R. Paredes-Torres; L. García-Ruiz; J. Luna-Abanto; K. Meza-García; I. Chávez- Passiuri; F. Berrospi-Espinoza; C. Luque-Vásquez Vásquez; E. Ruiz-Figueroa; E. Payet-Meza;