Sleeve gastrectomy as a surgical technique in bariatric surgery: Results of safety and effectiveness Joseba Castro Vázquez; Fátima Saravia Barahona; Carlos Loureiro González; Saioa Leturio Fernández; Marta García Fernández; Ana Moro Delgado; Julen Barrenetxea Asua; Javier Ortiz Lacorzana; Ismael Díez del Val;