Concepción Yárnoz1, Coro Miranda2, Carlos Chaveli2, Irene Pelegrín2. 1. Esophagogastric and Bariatric Unit. General Surgery Area, Complejo Hospitalario de Navarra, C/Irunlarrea 3, 31008, Pamplona, Spain. myarnozi@navarra.es. 2. Esophagogastric and Bariatric Unit. General Surgery Area, Complejo Hospitalario de Navarra, C/Irunlarrea 3, 31008, Pamplona, Spain.