Affiliation: | a General Surgery Service of the University Hospital Complex, Badajoz, Spain;b Department of Surgery, Faculty of Medicine, University of Extremadura, Avda Elvas s/n, 06071-Badajoz, Spain;c Department of Paediatric Surgery, Faculty of Medicine, University of Extremadura, Badajoz, Spain;d Department of Human Morphology, Faculty of Medicine, University of Extremadura, Badajoz, Spain |