Trebollé, José Fernando¹; Escolar, Juan de Dios²; Sánchez, Francisco Miguel³; García, Virginio Enrique⁴; Luesma, María José²; Cantarero, Irene⁵; Fatás, José Antonio¹; Maestre, Juan³; López, Carmen⁴; Usón, Jesús³

¹ Department of General Surgery and Digestive System. Royo Villanova Hospital. Zaragoza. Spain.
² Department of Human Anatomy and Histology. University of Zaragoza. Zaragoza. Spain.
³ Department of Surgery. Jesus Uson Minimally Invasive Surgery Centre. Caceres. Spain.
⁴ Department of Anatomy, Cell Biology and Zoology. University of Extremadura. Badajoz. Spain.
⁵ Department of Morphological Sciences and Sociosanitary. University of Cordoba. Cordoba. Spain.