1 Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', University of Sevilla, Sevilla, Spain.
2 Department of General Surgery, Hospital 'Vila Franca de Xira', Lisboa, Portugal.
3 Unit of General and Digestive Surgery, Hospital Quironsalud Sagrado Corazón, Sevilla, Spain.