Clinical guidelines. What they are and how to interpret them. GRADE methodology Víctor Soria Aledo; Benito Flores Pastor; José Luis Aguayo Albasini;

Assessment of postoperative morbidity in Spanish hospitals: Results from a national survey Roberto de la Plaza Llamas; David Parés; Víctor Soria Aledó; Roger Cabezali Sánchez; Miguel Ruiz Marín; Ana Senent Boza; Manuel Romero Simó; Natalia Alonso Hernández; Helena Vallverdú-Cartié; Julio Mayol Martínez;

First gastroduodenal artery approach for gastric cancer lymphadenectomy in situations of anatomical variations Alberto García Picazo; Ana Pérez Zapata; Elías Rodríguez Cuéllar; Eduardo Ferrero Herrero;