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;

Comparison of weight loss and metabolic syndrome parameters between sleeve gastrectomy and Roux-en-Y gastric bypass: A propensity score analysis María Asunción Acosta-Mérida; Raquel Bañolas-Suárez; Julia Díaz-Dávila; Pedro Saavedra-Santana; Joaquín Marchena-Gómez;

Impact of anesthetic technique on time to discharge of patients undergoing proctological surgery in major outpatient surgery Armando Cuesta Amigo; Nazrin Bakhshaliyeva; Javier García Septiem; Enrique Alday Muñoz;