Analysis of potential risk factors in the survival of patients with primary retroperitoneal liposarcoma Alessandro Bianchi; Alberto Pagan-Pomar; Rafael Ramos-Asensio; Pablo Luna-Fra; Marina Jiménez-Segovia; Natalia Pujol-Cano; Aina Ochogavia-Seguí; José Antonio Martínez-Corcoles; Francesc Xavier González-Argenté;

National observational study about the surgical treatment of anal fistula: Does the kind of hospital modify the results? Oscar Cano-Valderrama; Carlos Cerdán-Santacruz; Pilar Fernández Veiga; Tamara Fernández-Miguel; Elena Viejo; Álvaro García-Granero; Teresa Calderón; María L. Reyes;

Surgical steps for splenic flexure mobilization by inframesocolic medial approach Sebastián Jeri-McFarlane; Álvaro García-Granero; Matteo Frasson; Francisco Xavier Gonzalez-Argente;