Differential diagnosis of retroperitoneal tumor: chronic adrenal hematoma, an uncommon diagnosis Álvaro Soler-Silva; Verónica Aranaz-Ostáriz; Sandra Lario Pérez; José Antonio Barreras;

Megaesophagus secondary to Wilkie syndrome Álvaro Soler-Silva; Carlos Díaz-Lara; Inmaculada Oller; Antonio Arroyo;

Surgical Site Infection Prevention Measures in General Surgery: Position Statement by the Surgical Infections Division of the Spanish Association of Surgery Josep M. Badia; Inés Rubio Pérez; Alba Manuel; Estela Membrilla; Jaime Ruiz-Tovar; Cristóbal Muñoz-Casares; Javier Arias-Díaz; Jaime Jimeno; Xavier Guirao; José M. Balibrea;