Conversion from laparoscopic to open cholecystectomy: Risk factor analysis based on clinical, laboratory, and ultrasound parameters J. Morales-Maza; J.H. Rodríguez-Quintero; O. Santes; J.L. Aguilar-Frasco; G. Romero-Vélez; E. Sánchez García-Ramos; G. Sánchez-Morales; P. León; F.U. Pastor-Sifuentes; S. Mier y Terán-Ellis; F. Álvarez-Bautista; U. Clemente-Gutiérrez; M.A. Mercado-Díaz;

Interval gastric cancer: A call to attentiveness and action R. Castaño-Llano; A. Piñeres; R. Jaramillo; S. Molina; F. Aristizábal; J.E. Puerta;

Helicobacter pylori genotypes associated with gastric cancer and dysplasia in Colombian patients Y.H. Carlosama-Rosero; C.P. Acosta-Astaiza; C.H. Sierra-Torres; H.J. Bolaños-Bravo;