1 Department of Digestive Surgery, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
2 School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
3 Department of Digestive Surgery, Faculty of Medicine, Pontificia Universidad Católica de Chile, 362 Diagonal Paraguay, 4th Floor, Office 410, Santiago, Chile.
4 Department of Digestive Surgery, Faculty of Medicine, Pontificia Universidad Católica de Chile, 362 Diagonal Paraguay, 4th Floor, Office 410, Santiago, Chile. nfquezad@uc.cl.